Update actions/cache action to v4

.github/workflows/symfony.yml

@@ -43,7 +43,7 @@ jobs:
       run: php -r "file_exists('.env.test.local') || copy('.env.test', '.env.test.local');"
     - 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') }}