chore(deps): update actions/checkout action to v7 (#445)

Reviewed-on: https://gitea.com/gitea/docs/pulls/445
Co-authored-by: Renovate Bot <renovate-bot@gitea.com>
Co-committed-by: Renovate Bot <renovate-bot@gitea.com>

.gitea/workflows/build-and-publish.yaml

@@ -10,7 +10,7 @@ jobs:
   build-docs:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: pnpm/action-setup@v6
       - uses: actions/setup-node@v6
         with:

.gitea/workflows/test.yaml

@@ -7,7 +7,7 @@ jobs:
   build-docs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: pnpm/action-setup@v6
       - uses: actions/setup-node@v6
         with:

.gitea/workflows/update_swagger.yaml

@@ -9,7 +9,7 @@ jobs:
   update-swagger:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - run: |
           set -euo pipefail