Update Portal Network discord invite link

Author: KolbyML

src/content/developers/docs/networking-layer/portal-network/index.md

@@ -78,5 +78,5 @@ If one client experiences issues or vulnerabilities, other clients can continue
 ## Further reading {#futher-reading}
 
 - [The Portal Network (Piper Merriam at Devcon Bogota)](https://www.youtube.com/watch?v=0stc9jnQLXA).
-- [The Portal Network discord](https://discord.gg/6XFs56cX)
+- [The Portal Network discord](https://discord.gg/CFFnmE7Hbs)
 - [The Portal Network website](ethportal.net)