Summary:
Updated the release ent diagram using mermaid lib added in the previous diff.
nocommit until "docusaurus-plugin-internaldocs-fb" re-pointed back to npm in package.json.
Reviewed By: jknoxville
Differential Revision: D25594333
fbshipit-source-id: fd0b961c5265b8284d3c2e56e17b56fc38cc72c5
