Bump docker/build-push-action from 6.13.0 to 6.15.0

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@ca877d9...471d1dc)

---
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]>

Author: dependabot[bot]

.github/workflows/docker-build.yml

@@ -53,7 +53,7 @@ jobs:
         password: ${{ secrets.GITHUB_TOKEN }}
     - name: Build and push
       id: push
-      uses: docker/build-push-action@ca877d9245402d1537745e0e356eab47c3520991 # v6
+      uses: docker/build-push-action@471d1dc4e07e5cdedd4c2171150001c434f0b7a4 # v6
       with:
         context: ${{ inputs.path }}
         platforms: linux/amd64,linux/arm64