Update slack link

README.md

@@ -13,7 +13,7 @@ tags:
 </p>
 
 <p align="center">
-    👋 Join our <a href="https://join.slack.com/t/chatglm/shared_invite/zt-1t4a8evfn-vduo2hhNcYqBUnZ71IXiqQ" target="_blank">Slack</a> and <a href="https://github.com/THUDM/ChatGLM-6B/blob/main/resources/WECHAT.md" target="_blank">WeChat</a>
+    👋 Join our <a href="https://join.slack.com/t/chatglm/shared_invite/zt-1th2q5u69-7tURzFuOPanmuHy9hsZnKA" target="_blank">Slack</a> and <a href="https://github.com/THUDM/ChatGLM-6B/blob/main/resources/WECHAT.md" target="_blank">WeChat</a>
 </p>
 
 ## 介绍