chore(deps): update github actions to v7

Author: renovate[bot]

.github/workflows/deploy-docs.yml

@@ -26,7 +26,7 @@ jobs:
         working-directory: website
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Setup Node.js
         uses: actions/setup-node@v6

.github/workflows/phpunit.yml

@@ -33,7 +33,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Setup PHP ${{ matrix.php-version }}
         uses: shivammathur/setup-php@v2
@@ -57,19 +57,19 @@ jobs:
         run: composer install --prefer-dist --no-progress
 
       - name: Checkout WordPress develop
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           repository: WordPress/wordpress-develop
           path: wordpress-develop
 
       - name: Checkout database-module
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           repository: TangibleInc/database-module
           path: database-module
 
       - name: Checkout fields
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           repository: TangibleInc/fields
           path: fields