build(deps): bump actions/cache from 3 to 4 (#592)

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/tests.yml

@@ -48,7 +48,7 @@ jobs:
           key: php-extensions-cache
 
       - name: Cache extensions
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ steps.extcache.outputs.dir }}
           key: ${{ steps.extcache.outputs.key }}
@@ -67,7 +67,7 @@ jobs:
         run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
 
       - name: Cache composer dependencies
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ steps.composercache.outputs.dir }}
           key: dependencies-composer-${{ hashFiles('composer.lock') }}-php-${{ matrix.php-version }}