🔧 update workflow

Author: willpower232

.github/workflows/tests.yml

@@ -11,7 +11,7 @@ jobs:
         php: [7.4, "8.0", 8.1, 8.2, 8.3, 8.4]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: test on PHP ${{ matrix.php }}
         run: docker build . --build-arg PHP_VERSION=${{ matrix.php }}