Added Discord channel for Poiyomi link

Author: towneh

docs/avatar-shaders.mdx

@@ -9,7 +9,7 @@ title: Avatar Shaders
 ![image](https://cdn.sanity.io/images/fuvbjjlp/production/ed8ae4aba799bd64a04b6dee9e9f4eaee5735bc6-415x100.png)
 
 ## Poiyomi [Free Version](MIT License) by Poiyomi
-- https://discord.gg/poiyomi<br>
+- https://discord.gg/poiyomi #urp-release<br>
 ![image](https://s2.booth.pm/430bb41d-8aaa-46f4-ae48-63cff7c3ff3e/132c3ac8-cc2f-4858-9a92-2844c7f5cc05.png)
 
 ## lilToon (MIT License) by lilxzw