Add Kent Dodds's new Epic React course (#3321)

Author: gregalia

content/community/courses.md

@@ -51,3 +51,5 @@ permalink: community/courses.html
 - [React Tutorial](https://react-tutorial.app) - Learn React step by step in an interactive environment with flashcards.
 
 - [Road to React](https://www.roadtoreact.com/) - Your journey to master React in JavaScript.
+
+- [Epic React](https://epicreact.dev/) - Confidently Ship Well-Architected Production Ready React Apps Like a Pro