Bump docker/build-push-action from 6.14.0 to 6.15.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.14.0 to 6.15.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@0adf995...471d1dc)

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

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

Author: dependabot[bot]

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

@@ -51,7 +51,7 @@ jobs:
 
     - name: Build and push Docker image
       id: build-and-push
-      uses: docker/build-push-action@0adf9959216b96bec444f325f1e493d4aa344497 # v6
+      uses: docker/build-push-action@471d1dc4e07e5cdedd4c2171150001c434f0b7a4 # v6
       with:
         context: .
         file: ./docker/Dockerfile