Bump docusaurus to stable 2.0 version

[pruthvi2103]

Expected Behavior

upgrade docusaurus to v 2.0

Current Behavior

Docusaurus is at release candidate version and stuff may not be working best

Possible Solution

upgrade docusurus

Steps to Reproduce (for bugs)

1. Run dev
2. Message appears to upgrade docusaurus

Context

Message appearing on dev server and warning on builds

Always good to use stable library versions