Merge pull request #8 from surajssd/renovate/docker-build-push-action-7.x

chore(deps): update docker/build-push-action action to v7

Author: surajssd

.github/workflows/build-openclaw-image.yaml

@@ -43,7 +43,7 @@ jobs:
       run: echo "timestamp=$(TZ=America/Los_Angeles date +%Y%m%d-%H%M%S)" >> "${GITHUB_OUTPUT}"
 
     - name: Build and push
-      uses: docker/build-push-action@v6
+      uses: docker/build-push-action@v7
       with:
         context: containers/openclaw
         platforms: linux/amd64,linux/arm64