Doc: Changes required for CloudSQL PostgreSQL Batch Source markdown doc in plugin UI
Description
I've updated the CDAP wiki doc based on comments from users. It would be great to incorporate the same changes into the markdown UI Doc for this plugin. See the wiki for the comments and changes:
https://cdap.atlassian.net/wiki/spaces/DOCS/pages/687997219/Google+CloudSQL+PostgreSQL+Batch+Source
Release Notes
None
