docs: add npm downloads badge

Author: alvarosabu

README.md

@@ -1,10 +1,9 @@
 ![repository-banner.png](/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/post-processing?color=%2382DBCA" alt="npm package"></a>
-
-<a href="https://discord.gg/UCr96AQmWn"><img src="https://img.shields.io/badge/chat-discord-purple?style=flat&logo=discord" alt="discord chat"></a>
-
+  <a href="https://www.npmjs.com/package/@tresjs/core"><img src="https://img.shields.io/npm/v/@tresjs/post-processing?color=FF7BAC" alt="npm package"></a>
+  <a href="https://www.npmjs.com/package/@tresjs/post-processing"><img src="https://img.shields.io/npm/dm/@tresjs/post-processing?color=FF7BAC" alt="npm downloads"></a>
+  <a href="https://discord.gg/UCr96AQmWn"><img src="https://img.shields.io/badge/chat-discord-purple?style=flat&logo=discord" alt="discord chat"></a>
 </p>
 <br/>