chore(deps): update docker/build-push-action action to v6

Author: renovate[bot]

.github/workflows/docker-publish.yml

@@ -52,7 +52,7 @@ jobs:
             type=raw,value=latest,enable={{is_default_branch}}
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           platforms: linux/amd64,linux/arm64