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