Bump actions/checkout from 5 to 6 (#1166)

Bumps [actions/checkout](https://github.com/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
...

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/code-static-analysis.yml

@@ -32,7 +32,7 @@ jobs:
         language: ['javascript', 'python']
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Set up Python 3.12
         if: ${{ matrix.language == 'python' }}
         uses: actions/setup-python@v6

.github/workflows/linter.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           # Full git history is needed to get a proper list of changed files within `super-linter`
           fetch-depth: 0

.github/workflows/monthly-report-checks.yml

@@ -34,7 +34,7 @@ jobs:
     if: github.repository == 'HTTPArchive/httparchive.org'
     steps:
     - name: Checkout branch
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: Run the report checks
       env:
         REPORT_DATE: ${{ github.event.inputs.REPORT_DATE }}

.github/workflows/predeploy.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout branch
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: Setup Node.js for use with actions
       uses: actions/setup-node@v6
       with:

.github/workflows/production-checks.yml

@@ -24,7 +24,7 @@ jobs:
     if: github.repository == 'HTTPArchive/httparchive.org'
     steps:
     - name: Checkout branch
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: Set the list of URLs for Lighthouse to check
       run: ./tools/scripts/set_lighthouse_urls.sh -p
     - name: Audit URLs using Lighthouse

.github/workflows/test-website.yml

@@ -16,7 +16,7 @@ jobs:
     if: github.repository == 'HTTPArchive/httparchive.org'
     steps:
     - name: Checkout branch
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         # Full git history is needed to get a proper list of changed files within `super-linter`
         fetch-depth: 0