build(deps): bump docker/build-push-action from 5 to 6

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5...v6)

---
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]>

.github/workflows/push-docker.yml

@@ -48,7 +48,7 @@ jobs:
                   password: ${{ secrets.DOCKERHUB_TOKEN }}
 
             - name: Build and push the latest version
-              uses: docker/build-push-action@v5
+              uses: docker/build-push-action@v6
               if: github.event_name != 'release'
               with:
                   context: .
@@ -59,7 +59,7 @@ jobs:
                   cache-to: type=gha,mode=max
 
             - name: Build and push the released version
-              uses: docker/build-push-action@v5
+              uses: docker/build-push-action@v6
               if: github.event_name == 'release'
               with:
                   context: .