Fix GitHub link in README. (#3729)

Author: bryanrsmith

README.md

@@ -13,7 +13,7 @@
 <a href="https://twitter.com/colinhacks" rel="nofollow"><img src="https://img.shields.io/badge/created%[email protected]" alt="Created by Colin McDonnell"></a>
 <a href="https://opensource.org/licenses/MIT" rel="nofollow"><img src="https://img.shields.io/github/license/colinhacks/zod" alt="License"></a>
 <a href="https://www.npmjs.com/package/zod" rel="nofollow"><img src="https://img.shields.io/npm/dw/zod.svg" alt="npm"></a>
-<a href="https://www.npmjs.com/package/zod" rel="nofollow"><img src="https://img.shields.io/github/stars/colinhacks/zod" alt="stars"></a>
+<a href="https://github.com/colinhacks/zod" rel="nofollow"><img src="https://img.shields.io/github/stars/colinhacks/zod" alt="stars"></a>
 </p>
 
 <div align="center">