chore(deps): bump actions/checkout from 4.2.2 to 6.0.1

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.2.2 to 6.0.1.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4.2.2...v6.0.1)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/pr-validation.yml

@@ -20,7 +20,7 @@ jobs:
       matrix:
         php-versions: ['7.4', '8.1', '8.2', '8.3', '8.4']
     steps:
-    - uses: actions/checkout@v4.2.2
+    - uses: actions/checkout@v6.0.1
     - name: Setup PHP
       uses: shivammathur/setup-php@v2
       with:
@@ -41,7 +41,7 @@ jobs:
   code-coverage:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4.2.2
+    - uses: actions/checkout@v6.0.1
     - name: Setup PHP and Xdebug for Code Coverage report
       uses: shivammathur/setup-php@v2
       with:

.github/workflows/update-docs.yml

@@ -15,7 +15,7 @@ jobs:
   run-php-documentor:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4.2.2
+      - uses: actions/checkout@v6.0.1
         with:
           ref: ${{ github.ref }}