chore: bump renovatebot/github-action from 40.2.7 to 40.2.8

Bumps [renovatebot/github-action](https://github.com/renovatebot/github-action) from 40.2.7 to 40.2.8.
- [Release notes](https://github.com/renovatebot/github-action/releases)
- [Changelog](https://github.com/renovatebot/github-action/blob/main/CHANGELOG.md)
- [Commits](renovatebot/github-action@v40.2.7...v40.2.8)

---
updated-dependencies:
- dependency-name: renovatebot/github-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/test-containers.yaml

@@ -81,7 +81,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Self-hosted Renovate
-        uses: renovatebot/github-action@v40.2.7
+        uses: renovatebot/github-action@v40.2.8
         with:
           configurationFile: ./.github/renovate.json
           token: ${{ secrets.RENOVATE_GITHUB_TOKEN }}