chore(deps-dev): bump tailwindcss in /templates/react-router-app

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss) from 3.4.19 to 4.2.2.
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.2.2/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-version: 4.2.2
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

templates/react-router-app/package.json

@@ -25,7 +25,7 @@
     "@types/react-dom": "^19.2.3",
     "prettier": "^3.8.1",
     "prettier-plugin-tailwindcss": "^0.7.2",
-    "tailwindcss": "^4.2.1",
+    "tailwindcss": "^4.2.2",
     "typescript": "^5.9.3",
     "vite": "^7.3.1",
     "vite-tsconfig-paths": "^5.1.4"