Added multiplatform build

Author: oshankkumar

.github/workflows/build_taskmanager.yml

@@ -33,6 +33,7 @@ jobs:
       - name: Build and push
         uses: docker/build-push-action@v6
         with:
+          platforms: linux/amd64,linux/arm64
           file: Dockerfile-taskqueue-manager
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}