update readme (#94)

Author: KKZ20

README.md

@@ -3,7 +3,7 @@
 </p>
 <p align="center"><b><big>An Easy, Fast and Memory-Efficient System for DiT Training and Inference</big></b></p>
 </p>
-<p align="center"><a href="https://github.com/NUS-HPC-AI-Lab/OpenDiT">[Homepage]</a> | <a href="https://discord.gg/yXF4n8Et">[Discord]</a> | <a href="./figure/wechat.jpg">[WeChat]</a> | <a href="https://twitter.com/YangYou1991/status/1762447718105170185">[Twitter]</a> | <a href="https://zhuanlan.zhihu.com/p/684457582">[Zhihu]</a> | <a href="https://mp.weixin.qq.com/s/IBb9vlo8hfYKrj9ztxkhjg">[Media]</a></p>
+<p align="center"><a href="https://github.com/NUS-HPC-AI-Lab/OpenDiT">[Homepage]</a> | <a href="https://discord.gg/6UzVWm9a">[Discord]</a> | <a href="./figure/wechat.png">[WeChat]</a> | <a href="https://twitter.com/YangYou1991/status/1762447718105170185">[Twitter]</a> | <a href="https://zhuanlan.zhihu.com/p/684457582">[Zhihu]</a> | <a href="https://mp.weixin.qq.com/s/IBb9vlo8hfYKrj9ztxkhjg">[Media]</a></p>
 </p>
 
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