chore(deps): bump actions/checkout from 4.2.2 to 6.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.2.2 to 6.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4.2.2...v6.0.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci-grunt.yaml

@@ -19,7 +19,7 @@ jobs:
       contents: read
     steps:
       - name: Check out source code
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v6.0.0
 
       - name: Set up Node.js environment
         uses: actions/[email protected]

.github/workflows/ci-php.yaml

@@ -45,7 +45,7 @@ jobs:
         run: sudo apt-get update && sudo apt-get install -y subversion
 
       - name: Check out source code
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v6.0.0
 
       - name: Set up PHP
         uses: shivammathur/setup-php@v2

.github/workflows/codeql.yml

@@ -28,7 +28,7 @@ jobs:
           - actions
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v6.0.0
 
       - name: Initialize CodeQL
         uses: github/codeql-action/[email protected]

.github/workflows/dependency-review.yml

@@ -15,7 +15,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Check out the source code
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v6.0.0
 
       - name: Review dependencies
         uses: actions/[email protected]

.github/workflows/phpcs.yaml

@@ -19,7 +19,7 @@ jobs:
       contents: read
     steps:
       - name: Check out source code
-        uses: actions/checkout@v4.2.2
+        uses: actions/checkout@v6.0.0
 
       - name: Set up PHP
         uses: shivammathur/setup-php@v2