build(deps): bump docker/build-push-action in the devops group (Zcash…

…Foundation#8698)

Bumps the devops group with 1 update: [docker/build-push-action](https://github.com/docker/build-push-action).


Updates `docker/build-push-action` from 6.3.0 to 6.4.1
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v6.3.0...v6.4.1)

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

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

.github/workflows/sub-build-docker-image.yml

@@ -158,7 +158,7 @@ jobs:
       # Build and push image to Google Artifact Registry, and possibly DockerHub
       - name: Build & push
         id: docker_build
-        uses: docker/build-push-action@v6.3.0
+        uses: docker/build-push-action@v6.4.1
         with:
           target: ${{ inputs.dockerfile_target }}
           context: .