Bump docker/build-push-action from 5.0.0 to 6.2.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5.0.0 to 6.2.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@0565240...1556069)

---
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/release-50_publish-docker.yml

@@ -268,7 +268,7 @@ jobs:
 
       - name: Build and push
         id:   docker_build
-        uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09 #  v5.0.0
+        uses: docker/build-push-action@15560696de535e4014efeff63c48f16952e52dd1 #  v6.2.0
         with:
           push: true
           file: docker/dockerfiles/polkadot/polkadot_injected_debian.Dockerfile