Chore(deps): Bump actions/checkout from 3.6.0 to 4.1.1

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.6.0 to 4.1.1.
- [Release notes](https://github.com/actions/checkout/releases)
- [Commits](https://github.com/actions/checkout/compare/v3.6.0...v4.1.1)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/integration.yml

@@ -52,7 +52,7 @@ jobs:
 
     steps:
       - name: Checkout server
-        uses: actions/checkout@v4
+        uses: actions/checkout@v4.1.1
         with:
           repository: nextcloud/server
           ref: ${{ matrix.server-versions }}
@@ -66,7 +66,7 @@ jobs:
           cd build/integration && composer require --dev phpunit/phpunit:~9
 
       - name: Checkout app
-        uses: actions/checkout@v4
+        uses: actions/checkout@v4.1.1
         with:
           path: apps/${{ env.APP_NAME }}