chore: update discord link (gnoverse#61)

Author: Olexandr88

README.md

@@ -105,7 +105,7 @@ _Connecting web2 to the gno.land blockchain._
 
 _gno.land's official socials._
 
-- [Discord](https://discord.gg/3YbdqVP8Tb)
+- [Discord](https://discord.com/invite/YFtMjWwUN7)
 - [Telegram](https://t.me/gnoland)
 - [X/Twitter](https://x.com/_gnoland)
 - [YouTube](https://www.youtube.com/@_gnoland)
@@ -144,4 +144,4 @@ _Older, outdated, or archived items._
 - [test3.gno.land](https://test3.gno.land/) - Third official testnet environment (archive).
 - [test2.gno.land](https://test2.gno.land/) - Second official testnet environment (archive).
 - [test1.gno.land](https://test1.gno.land/) - First official testnet environment (archive).
-- [Hello Gno!](https://github.com/xplrz/gnoland-workshop) - A step-by-step workshop on Gno and gno.land's main features.
+- [Hello Gno!](https://github.com/xplrz/gnoland-workshop) - A step-by-step workshop on Gno and gno.land's main features.