pointed REACT_APP_HUB_API_URL to prod

Author: htahir1

.env

@@ -1,4 +1,3 @@
 REACT_APP_BASE_API_URL="https://appserver.zenml.io/api/v1"
-REACT_APP_HUB_API_URL="https://rehaul-zenml-hub-mc5klosfeq-ew.a.run.app"
-# REACT_APP_HUB_API_URL="https://staging.hubapi.zenml.io"
+REACT_APP_HUB_API_URL="https://hubapi.zenml.io"
 REACT_APP_VERSION=$npm_package_version