ci: bump docker/build-push-action from 5.4.0 to 6.3.0

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5.4.0 to 6.3.0.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5.4.0...v6.3.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -99,7 +99,7 @@ jobs:
 
 
       - name: Push Docker image
-        uses: docker/build-push-action@v5.4.0
+        uses: docker/build-push-action@v6.3.0
         id: docker_build_and_push
         with:
           context: "${{ env.examples_dir }}/${{ env.backend_dir_name }}"