Update index.md

Author: yuting-jn

docs/index.md

@@ -27,4 +27,4 @@
 ## Learn more about Agora
 👋 Welcome to join our cofounder Yuting’s talk on [d/acc day](https://luma.com/5zs3pvxx?tk=inkOj7).
 
-🛠️ For any technical issue, please contact us on [Telegram](https://t.me/agorabyzkorum).
+🛠️ For any technical issue, please contact us on [Telegram](https://t.me/agorabyzkorum) or [Discord]((https://discord.gg/cAkAJQSTEU).