Bump actions/cache from 3 to 4

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](https://github.com/actions/cache/compare/v3...v4)

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

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

.github/workflows/php.yml

@@ -50,7 +50,7 @@ jobs:
           key: ${{ env.key }}
 
       - name: Cache extensions
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ${{ steps.cache-env.outputs.dir }}
           key: ${{ steps.cache-env.outputs.key }}