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](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] <support@github.com>

.github/workflows/main.yaml

@@ -20,7 +20,7 @@ jobs:
 
             - name: Cache Composer packages
               id: composer-cache
-              uses: actions/cache@v3
+              uses: actions/cache@v4
               with:
                 path: vendor
                 key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
@@ -57,7 +57,7 @@ jobs:
                   php-version: ${{ matrix.php }}
 
             - name: Cache PHP dependencies
-              uses: actions/cache@v3
+              uses: actions/cache@v4
               with:
                   path: vendor
                   key: ${{ runner.os }}-php-${{ matrix.php }}-composer-${{ hashFiles('**/composer.json') }}