Bump actions/cache from 2 to 4 (#52)

Bumps [actions/cache](https://github.com/actions/cache) from 2 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v2...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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/laravel.yml

@@ -26,7 +26,7 @@ jobs:
         name: Checkout repository
 
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.composer/cache/files
           key: dependencies-php-${{ matrix.php }}-composer-${{ hashFiles('composer.json') }}

.github/workflows/security-checks.yml

@@ -32,7 +32,7 @@ jobs:
           composer-options: ${{ matrix.composer-options }} --no-dev
 
       - name: Cache security checker dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.symfony/cache
           key: security-checker-db

.github/workflows/slim.yml

@@ -21,7 +21,7 @@ jobs:
         name: Checkout repository
 
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.composer/cache/files
           key: dependencies-php-${{ matrix.php }}-composer-${{ hashFiles('composer.json') }}