Update docker/build-push-action action to v6

Author: renovate[bot]

.github/workflows/docker.yml

@@ -40,7 +40,7 @@ jobs:
         password: ${{ secrets.DOCKERHUB_PASSWORD }}
     - name: "Build and push docker image to DockerHub"
       id: docker_build
-      uses: docker/build-push-action@v5
+      uses: docker/build-push-action@v6
       with:
         platforms: linux/amd64,linux/arm64
         push: ${{ (github.event_name == 'release' && github.event.action == 'created') || github.event.pull_request.head.repo.full_name == github.repository }}