Fix: Update demo link in README.md

The old link (https://react-live.kitten.sh/) seems broken and https://react-live.netlify.com/ is already present in the repository description header.

Author: RobinCsl

README.md

@@ -42,7 +42,7 @@ import {
 
 ## Demo
 
-[https://react-live.kitten.sh/](https://react-live.kitten.sh/)
+[https://react-live.netlify.com/](https://react-live.netlify.com/)
 
 ## FAQ