Bump docker/build-push-action from 6.0.1 to 6.1.0 (#304)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6.0.1 to 6.1.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@94f8f8c...31159d4)

---
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/ci.yml

@@ -68,7 +68,7 @@ jobs:
         uses: docker/setup-buildx-action@d70bba72b1f3fd22344832f00baa16ece964efeb # v3.3.0
 
       - name: Build Plus Docker Image
-        uses: docker/build-push-action@94f8f8c2eec4bc3f1d78c1755580779804cb87b2 # v6.0.1
+        uses: docker/build-push-action@31159d49c0d4756269a0940a750801a1ea5d7003 # v6.1.0
         with:
           file: docker/Dockerfile
           tags: nginx-plus