Update actions/checkout action to v7

Author: renovate[bot]

.github/workflows/codecov.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Install PHP
         uses: shivammathur/setup-php@v2

.github/workflows/qodana_code_quality.yml

@@ -18,7 +18,7 @@ jobs:
       matrix:
         php-versions: ['8.3', '8.4', '8.5' ]
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           ref: ${{ github.event.pull_request.head.sha }}  # to check out the actual pull request commit, not the merge commit
           fetch-depth: 0  # a full history is required for pull request analysis

.github/workflows/static-analysis.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Install PHP
         uses: shivammathur/setup-php@v2

.github/workflows/validate-database-schema.yml

@@ -28,7 +28,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Install PHP
         uses: shivammathur/setup-php@v2