update branch in CI and docs (#15631)

doc/advanced/customizing-gitea.en-us.md

@@ -35,7 +35,7 @@ Again `gitea help` will allow you review this variable and you can override it u
 `--config` option on the `gitea` binary.
 
 - [Quick Cheat Sheet](https://docs.gitea.io/en-us/config-cheat-sheet/)
-- [Complete List](https://github.com/go-gitea/gitea/blob/master/custom/conf/app.example.ini)
+- [Complete List](https://github.com/go-gitea/gitea/blob/main/custom/conf/app.example.ini)
 
 If the `CustomPath` folder can't be found despite checking `gitea help`, check the `GITEA_CUSTOM`
 environment variable; this can be used to override the default path to something else.
@@ -87,14 +87,14 @@ directory at the top of this document).
 Every single page of Gitea can be changed. Dynamic content is generated using [go templates](https://golang.org/pkg/html/template/),
 which can be modified by placing replacements below the `$GITEA_CUSTOM/templates` directory.
 
-To obtain any embedded file (including templates), the [`gitea embedded` tool]({{< relref "doc/advanced/cmd-embedded.en-us.md" >}}) can be used. Alternatively, they can be found in the [`templates`](https://github.com/go-gitea/gitea/tree/master/templates) directory of Gitea source (Note: the example link is from the `master` branch. Make sure to use templates compatible with the release you are using).
+To obtain any embedded file (including templates), the [`gitea embedded` tool]({{< relref "doc/advanced/cmd-embedded.en-us.md" >}}) can be used. Alternatively, they can be found in the [`templates`](https://github.com/go-gitea/gitea/tree/main/templates) directory of Gitea source (Note: the example link is from the `main` branch. Make sure to use templates compatible with the release you are using).
 
 Be aware that any statement contained inside `{{` and `}}` are Gitea's template syntax and
 shouldn't be touched without fully understanding these components.
 
 ### Customizing startpage / homepage
 
-Copy [`home.tmpl`](https://github.com/go-gitea/gitea/blob/master/templates/home.tmpl) for your version of Gitea from `templates` to `$GITEA_CUSTOM/templates`.
+Copy [`home.tmpl`](https://github.com/go-gitea/gitea/blob/main/templates/home.tmpl) for your version of Gitea from `templates` to `$GITEA_CUSTOM/templates`.
 Edit as you wish.
 Dont forget to restart your gitea to apply the changes.
 
@@ -113,7 +113,7 @@ For more information, see [Adding Legal Pages](https://docs.gitea.io/en-us/addin
 You can add new tabs in the same way, putting them in `extra_tabs.tmpl`.
 The exact HTML needed to match the style of other tabs is in the file
 `templates/repo/header.tmpl`
-([source in GitHub](https://github.com/go-gitea/gitea/blob/master/templates/repo/header.tmpl))
+([source in GitHub](https://github.com/go-gitea/gitea/blob/main/templates/repo/header.tmpl))
 
 ### Other additions to the page
 
@@ -258,7 +258,7 @@ Then restart gitea and open a STL file on your gitea instance.
 
 The `$GITEA_CUSTOM/templates/mail` folder allows changing the body of every mail of Gitea.
 Templates to override can be found in the
-[`templates/mail`](https://github.com/go-gitea/gitea/tree/master/templates/mail)
+[`templates/mail`](https://github.com/go-gitea/gitea/tree/main/templates/mail)
 directory of Gitea source.
 Override by making a copy of the file under `$GITEA_CUSTOM/templates/mail` using a
 full path structure matching source.
@@ -282,7 +282,7 @@ To add custom .gitignore, add a file with existing [.gitignore rules](https://gi
 
 ### Labels
 
-To add a custom label set, add a file that follows the [label format](https://github.com/go-gitea/gitea/blob/master/options/label/Default) to `$GITEA_CUSTOM/options/label`
+To add a custom label set, add a file that follows the [label format](https://github.com/go-gitea/gitea/blob/main/options/label/Default) to `$GITEA_CUSTOM/options/label`
 `#hex-color label name ; label description`
 
 ### Licenses
@@ -293,7 +293,7 @@ To add a custom license, add a file with the license text to `$GITEA_CUSTOM/opti
 
 Locales are managed via our [crowdin](https://crowdin.com/project/gitea).
 You can override a locale by placing an altered locale file in `$GITEA_CUSTOM/options/locale`.
-Gitea's default locale files can be found in the [`options/locale`](https://github.com/go-gitea/gitea/tree/master/options/locale) source folder and these should be used as examples for your changes.
+Gitea's default locale files can be found in the [`options/locale`](https://github.com/go-gitea/gitea/tree/main/options/locale) source folder and these should be used as examples for your changes.
 
 To add a completely new locale, as well as placing the file in the above location, you will need to add the new lang and name to the `[i18n]` section in your `app.ini`. Keep in mind that Gitea will use those settings as **overrides**, so if you want to keep the other languages as well you will need to copy/paste the default values and add your own to them.
 

doc/developers/hacking-on-gitea.en-us.md

@@ -86,7 +86,7 @@ from within the `$GOPATH`, hence the `go get` approach is no longer recommended.
 
 ## Forking Gitea
 
-Download the master Gitea source code as above. Then, fork the
+Download the main Gitea source code as above. Then, fork the
 [Gitea repository](https://github.com/go-gitea/gitea) on GitHub,
 and either switch the git remote origin for your fork or add your fork as another remote:
 
@@ -123,7 +123,7 @@ TAGS="bindata sqlite sqlite_unlock_notify" make build
 
 The `build` target will execute both `frontend` and `backend` sub-targets. If the `bindata` tag is present, the frontend files will be compiled into the binary. It is recommended to leave out the tag when doing frontend development so that changes will be reflected.
 
-See `make help` for all available `make` targets. Also see [`.drone.yml`](https://github.com/go-gitea/gitea/blob/master/.drone.yml) to see how our continuous integration works.
+See `make help` for all available `make` targets. Also see [`.drone.yml`](https://github.com/go-gitea/gitea/blob/main/.drone.yml) to see how our continuous integration works.
 
 ## Building continuously
 
@@ -276,7 +276,7 @@ require `git lfs` to be installed. Other database tests are available but
 may need adjustment to the local environment.
 
 Look at
-[`integrations/README.md`](https://github.com/go-gitea/gitea/blob/master/integrations/README.md)
+[`integrations/README.md`](https://github.com/go-gitea/gitea/blob/main/integrations/README.md)
 for more information and how to run a single test.
 
 Our continuous integration will test the code passes its unit tests and that
@@ -304,19 +304,19 @@ be cleaned up.
 
 A `launch.json` and `tasks.json` are provided within `contrib/ide/vscode` for
 Visual Studio Code. Look at
-[`contrib/ide/README.md`](https://github.com/go-gitea/gitea/blob/master/contrib/ide/README.md)
+[`contrib/ide/README.md`](https://github.com/go-gitea/gitea/blob/main/contrib/ide/README.md)
 for more information.
 
 ## Submitting PRs
 
 Once you're happy with your changes, push them up and open a pull request. It
 is recommended that you allow Gitea Managers and Owners to modify your PR
-branches as we will need to update it to master before merging and/or may be
+branches as we will need to update it to main before merging and/or may be
 able to help fix issues directly.
 
 Any PR requires two approvals from the Gitea maintainers and needs to pass the
 continous integration. Take a look at our
-[`CONTRIBUTING.md`](https://github.com/go-gitea/gitea/blob/master/CONTRIBUTING.md)
+[`CONTRIBUTING.md`](https://github.com/go-gitea/gitea/blob/main/CONTRIBUTING.md)
 document.
 
 If you need more help pop on to [Discord](https://discord.gg/gitea) #Develop

doc/developers/migrations.en-us.md

@@ -20,7 +20,7 @@ repository data from other git host platforms to Gitea or, in the future, migrat
 git host platforms.  
 Currently, migrations from Github, Gitlab, and other Gitea instances are implemented.
 
-First of all, Gitea defines some standard objects in packages [modules/migrations/base](https://github.com/go-gitea/gitea/tree/master/modules/migrations/base).  
+First of all, Gitea defines some standard objects in packages [modules/migrations/base](https://github.com/go-gitea/gitea/tree/main/modules/migrations/base).  
 They are `Repository`, `Milestone`, `Release`, `ReleaseAsset`, `Label`, `Issue`, `Comment`, `PullRequest`, `Reaction`, `Review`, `ReviewComment`.
 
 ## Downloader Interfaces
@@ -31,11 +31,11 @@ To migrate from a new git host platform, there are two steps to be updated.
 - You should implement a `DownloaderFactory` which will be used to detect if the URL matches and create the above `Downloader`.
    - You'll need to register the `DownloaderFactory` via `RegisterDownloaderFactory` on `init()`.
 
-You can find these interfaces in [downloader.go](https://github.com/go-gitea/gitea/blob/master/modules/migrations/base/downloader.go).
+You can find these interfaces in [downloader.go](https://github.com/go-gitea/gitea/blob/main/modules/migrations/base/downloader.go).
 
 ## Uploader Interface
 
 Currently, only a `GiteaLocalUploader` is implemented, so we only save downloaded
 data via this `Uploader` to the local Gitea instance. Other uploaders are not supported at this time.
 
-You can find these interfaces in [uploader.go](https://github.com/go-gitea/gitea/blob/master/modules/migrations/base/uploader.go).
+You can find these interfaces in [uploader.go](https://github.com/go-gitea/gitea/blob/main/modules/migrations/base/uploader.go).

doc/installation/from-source.en-us.md

@@ -54,8 +54,8 @@ git clone https://github.com/go-gitea/gitea
 no longer necessary.)
 
 Decide which version of Gitea to build and install. Currently, there are
-multiple options to choose from. The `master` branch represents the current
+multiple options to choose from. The `main` branch represents the current
-development version. To build with master, skip to the [build section](#build).
+development version. To build with main, skip to the [build section](#build).
 
 To work with tagged releases, the following commands can be used:
 
@@ -89,7 +89,7 @@ To build from source, the following programs must be present on the system:
 - `node` {{< min-node-version >}} or higher with `npm`, see [here](https://nodejs.org/en/download/)
 - `make`, see <a href='{{< relref "doc/developers/hacking-on-gitea.en-us.md" >}}#installing-make'>here</a>
 
-Various [make tasks](https://github.com/go-gitea/gitea/blob/master/Makefile)
+Various [make tasks](https://github.com/go-gitea/gitea/blob/main/Makefile)
 are provided to keep the build process as simple as possible.
 
 Depending on requirements, the following build tags can be included.

doc/installation/with-docker-rootless.en-us.md

@@ -266,7 +266,7 @@ docker-compose up -d
 
 ## Managing Deployments With Environment Variables
 
-In addition to the environment variables above, any settings in `app.ini` can be set or overridden with an environment variable of the form: `GITEA__SECTION_NAME__KEY_NAME`. These settings are applied each time the docker container starts. Full information [here](https://github.com/go-gitea/gitea/tree/master/contrib/environment-to-ini).
+In addition to the environment variables above, any settings in `app.ini` can be set or overridden with an environment variable of the form: `GITEA__SECTION_NAME__KEY_NAME`. These settings are applied each time the docker container starts. Full information [here](https://github.com/go-gitea/gitea/tree/main/contrib/environment-to-ini).
 
 These environment variables can be passed to the docker container in `docker-compose.yml`. The following example will enable an smtp mail server if the required env variables `GITEA__mailer__FROM`, `GITEA__mailer__HOST`, `GITEA__mailer__PASSWD` are set on the host or in a `.env` file in the same directory as `docker-compose.yml`:
 

doc/upgrade/from-gogs.en-us.md

@@ -96,7 +96,7 @@ See [#4286](https://github.com/go-gitea/gitea/issues/4286).
 
 ## Add Gitea to startup on Unix
 
-Update the appropriate file from [gitea/contrib](https://github.com/go-gitea/gitea/tree/master/contrib)
+Update the appropriate file from [gitea/contrib](https://github.com/go-gitea/gitea/tree/main/contrib)
 with the right environment variables.
 
 For distros with systemd: