docs: update readme badge

README.md

@@ -1,7 +1,7 @@
 ![repo-banner](/public/repo-banner.png)
 
 <p align="center">
-  <a href="https://www.npmjs.com/package/@tresjs/core"><img src="https://img.shields.io/npm/v/@tresjs/core/beta?color=%2382DBCA" alt="npm package"></a>
+  <a href="https://www.npmjs.com/package/@tresjs/core"><img src="https://img.shields.io/npm/v/@tresjs/core/next?color=%2382DBCA" alt="npm package"></a>
   <a href="https://discord.gg/tfY9aSNT"><img src="https://img.shields.io/badge/chat-discord-purple?style=flat&logo=discord" alt="discord chat"></a>
 </p>