Merge pull request #248 from SwiftFiddle/renovate/docker-build-push-action-6.x

Update docker/build-push-action action to v6

Author: kishikawakatsumi

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_PASSWORD }}
 
-      - uses: docker/build-push-action@v4
+      - uses: docker/build-push-action@v6
         with:
           context: .
           push: true