Update actions/checkout action to v7

Author: renovate[bot]

.github/workflows/php.yml

@@ -15,7 +15,7 @@ jobs:
           php-version: ${{ matrix.php-versions }}
 
       - name: Checkout the code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
         with:
           fetch-depth: 0