Bump docker/build-push-action from 3.1.0 to 6.5.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 3.1.0 to 6.5.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@1cb9d22...5176d81)

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

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

.github/workflows/docker-publish.yml

@@ -25,7 +25,7 @@ jobs:
           images: alfg/nginx-rtmp
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@1cb9d22b932e4832bb29793b7777ec860fc1cde0
+        uses: docker/build-push-action@5176d81f87c23d6fc96624dfdbcd9f3830bbe445
         with:
           context: .
           push: true