Merge pull request #1051 from gravitl/feature_v0.13.1_go_builder_update

extend to create arm64 images

.github/workflows/docker-builder.yml

@@ -18,11 +18,11 @@ jobs:
       with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
-      name: Build and push to docker hub
+    - name: Build and push to docker hub
       uses: docker/build-push-action@v2
       with:
         context: .
-        load: true
-        platform: linux/amd64
+        push: true
+        platforms: linux/amd64, linux/arm64
         file: ./docker/Dockerfile-go-builder
         tags: gravitl/go-builder:latest