Bump docker/build-push-action from 5.3.0 to 6.15.0 (#1364)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5.3.0 to 6.15.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@2cdde99...471d1dc)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: 6.15.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build-ci-image.yml

@@ -59,7 +59,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build and Publish Image
-        uses: docker/build-push-action@2cdde995de11925a030ce8070c3d77a52ffcf1c0 # 5.3.0
+        uses: docker/build-push-action@471d1dc4e07e5cdedd4c2171150001c434f0b7a4 # 6.15.0
         with:
           push: ${{ github.event_name != 'pull_request' }}
           context: .github/containers