chore(deps): Bump the github-actions group across 4 directories with 1 update

Bumps the github-actions group with 1 update in the / directory: [actions/checkout](https://github.com/actions/checkout).
Bumps the github-actions group with 1 update in the /.github/actions/gh-cache/delete directory: [actions/checkout](https://github.com/actions/checkout).
Bumps the github-actions group with 1 update in the /.github/actions/gh-cache/restore directory: [actions/checkout](https://github.com/actions/checkout).
Bumps the github-actions group with 1 update in the /.github/actions/gh-cache/save directory: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 5 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

Updates `actions/checkout` from 5 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

Updates `actions/checkout` from 5 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

Updates `actions/checkout` from 5 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/actions/gh-cache/delete/action.yml

@@ -40,7 +40,7 @@ runs:
         fi
 
     - name: Checkout repository to temporary directory
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         token: ${{ inputs.token }}
         fetch-depth: 0

.github/actions/gh-cache/restore/action.yml

@@ -44,7 +44,7 @@ runs:
         fi
 
     - name: Checkout repository to temporary directory
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         token: ${{ inputs.token }}
         fetch-depth: 0

.github/actions/gh-cache/save/action.yml

@@ -40,7 +40,7 @@ runs:
         fi
 
     - name: Checkout repository to temporary directory
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         token: ${{ inputs.token }}
         fetch-depth: 0

.github/workflows/test.yml

@@ -31,7 +31,7 @@ jobs:
         site: ["sites/site-with-errors"]
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Ruby
         uses: ruby/setup-ruby@8aeb6ff8030dd539317f8e1769a044873b56ea71