Update courses.md (#4282)

Current Tyler McGinnis link no longer works. Updated it to the homepage instead.

content/community/courses.md

@@ -47,7 +47,7 @@ permalink: community/courses.html
 
 - [React Training: Advanced React.js](https://courses.reacttraining.com/p/advanced-react) - Take your React skills to the next level.
 
-- [Tyler McGinnis](https://tylermcginnis.com/courses) - Tyler McGinnis provides access to his courses for a monthly fee. Courses include "React Fundamentals" and "Universal React".
+- [Tyler McGinnis](https://ui.dev/) - Tyler McGinnis provides access to his courses for a monthly fee. Courses include "React Fundamentals" and "Universal React".
 
 - [Mastering React](https://codewithmosh.com/p/mastering-react/) - Build professional interactive apps with React.