Bump actions/cache from 4 to 5

Bumps [actions/cache](https://github.com/actions/cache) from 4 to 5.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4...v5)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -28,7 +28,7 @@ jobs:
 
     - name: "Cache Composer packages"
       id: "composer-cache"
-      uses: "actions/cache@v4"
+      uses: "actions/cache@v5"
       with:
         path: "vendor"
         key: ${{ runner.os }}-php-${{ matrix.php-versions }}-${{ hashFiles('**/composer.lock') }}