Bump docker/build-push-action from 6.13.0 to 6.15.0 (#1557)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.13.0 to 6.15.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v6.13.0...v6.15.0)

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

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

Author: dependabot[bot]

.github/workflows/ui-docker-image.yml

@@ -50,7 +50,7 @@ jobs:
                   images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 
             - name: Build Docker Image and Push
-              uses: docker/build-push-action@v6.13.0
+              uses: docker/build-push-action@v6.15.0
               with:
                   context: .
                   file: docker/Dockerfile

.github/workflows/ui-release.yml

@@ -91,7 +91,7 @@ jobs:
                   images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 
             - name: Build Docker Image and Push
-              uses: docker/build-push-action@v6.13.0
+              uses: docker/build-push-action@v6.15.0
               with:
                   context: .
                   file: docker/Dockerfile