Bump actions/checkout from 3 to 4 (#629)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

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

Author: dependabot[bot]

.github/workflows/deploy-playground-runner.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: "ubuntu-latest"
     steps:
       - name: "Checkout"
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 2
       - name: "Install Node"

.github/workflows/php.yml

@@ -19,7 +19,7 @@ jobs:
           - "8.1"
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v3"
+        uses: "actions/checkout@v4"
       - name: "Install PHP"
         uses: "shivammathur/setup-php@v2"
         with:
@@ -56,7 +56,7 @@ jobs:
             experimental: true
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v3"
+        uses: "actions/checkout@v4"
       - name: "Install PHP"
         uses: "shivammathur/setup-php@v2"
         with:
@@ -97,7 +97,7 @@ jobs:
             experimental: true
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v3"
+        uses: "actions/checkout@v4"
       - name: "Install PHP"
         uses: "shivammathur/setup-php@v2"
         with:
@@ -169,7 +169,7 @@ jobs:
             experimental: true
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v3"
+        uses: "actions/checkout@v4"
       - name: "Install PHP"
         uses: "shivammathur/setup-php@v2"
         with:
@@ -209,7 +209,7 @@ jobs:
     name: "Drupal core HEAD baseline check"
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v3"
+        uses: "actions/checkout@v4"
       - name: "set the version alias for self"
         run: |
           if [ "${{ github.event_name }}" == 'pull_request' ]; then

.github/workflows/phpstan-dev.yml

@@ -17,7 +17,7 @@ jobs:
           - '1.11.x-dev'
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v3"
+        uses: "actions/checkout@v4"
       - name: "Install PHP"
         uses: "shivammathur/setup-php@v2"
         with: