Upgrade actions/cache from v2 to v4

Author: sergix44

.github/workflows/php.yml

@@ -29,7 +29,7 @@ jobs:
 
             -   name: Cache Composer packages
                 id: composer-cache
-                uses: actions/cache@v2
+                uses: actions/cache@v4
                 with:
                     path: vendor
                     key: ${{ runner.os }}-php-${{ matrix.php }}-${{ hashFiles('**/composer.json') }}