Update docker/build-push-action action to v6

Author: renovate[bot]

.github/workflows/docker.yml

@@ -49,7 +49,7 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
       - name: Build and push to Docker Hub
-        uses: docker/build-push-action@v5.3.0
+        uses: docker/build-push-action@v6.0.2
         with:
           context: ./${{ matrix.config.name }}/.
           file: ./${{ matrix.config.name }}/Dockerfile