Bump actions/checkout from 6 to 7 (#994)

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/php.yml

@@ -18,7 +18,7 @@ jobs:
           - "8.4"
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v6"
+        uses: "actions/checkout@v7"
       - name: "Install PHP"
         uses: "shivammathur/setup-php@v2"
         with:
@@ -53,7 +53,7 @@ jobs:
             experimental: true
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v6"
+        uses: "actions/checkout@v7"
       - name: "Install PHP"
         uses: "shivammathur/setup-php@v2"
         with:
@@ -98,7 +98,7 @@ jobs:
             experimental: true
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v6"
+        uses: "actions/checkout@v7"
       - name: "Install PHP"
         uses: "shivammathur/setup-php@v2"
         with:
@@ -174,7 +174,7 @@ jobs:
             experimental: true
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v6"
+        uses: "actions/checkout@v7"
       - name: "Install PHP"
         uses: "shivammathur/setup-php@v2"
         with:
@@ -214,7 +214,7 @@ jobs:
     name: "Drupal core HEAD baseline check"
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v6"
+        uses: "actions/checkout@v7"
       - name: "set the version alias for self"
         run: |
           if [ "${{ github.event_name }}" == 'pull_request' ]; then