Merge pull request #291 from python-discord/renovate/docker-build-push-action-6.x

Update docker/build-push-action action to v6

Author: jb3

.github/workflows/forms-backend.yml

@@ -78,7 +78,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build and push
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: ./Dockerfile