Bump actions/checkout from 4 to 6 (#11)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...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/codeql.yml

@@ -57,7 +57,7 @@ jobs:
         # your codebase is analyzed, see https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     # Add any setup steps before running the `github/codeql-action/init` action.
     # This includes steps like installing compilers or runtimes (`actions/setup-node`

.github/workflows/docker-build.yml

@@ -26,7 +26,7 @@ jobs:
       hub_digest: ${{ steps.hub.outputs.digest }}
       su_digest:  ${{ steps.su.outputs.digest }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with: { submodules: recursive, fetch-depth: 0 }
       - uses: docker/setup-buildx-action@v3
 
@@ -111,7 +111,7 @@ jobs:
       hub_digest: ${{ steps.hub.outputs.digest }}
       su_digest:  ${{ steps.su.outputs.digest }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with: { submodules: recursive, fetch-depth: 0 }
       - uses: docker/setup-buildx-action@v3
 
@@ -193,7 +193,7 @@ jobs:
     runs-on: ubuntu-22.04
     if: ${{ github.event_name != 'pull_request' }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with: { submodules: recursive, fetch-depth: 0 }
       - uses: docker/setup-buildx-action@v3