update Discord link

Author: R-Sandor

README.md

@@ -61,7 +61,7 @@ make run
 
 - If you're interested in contributing please do: [Contributing.md](/docs/CONTRIBUTING.md)
 - Developers Guide: [Developers Guide](/docs/README.dev.md)
-- Join the Discord: [FindFirst Discord](https://discord.gg/trNnpqweMH)
+- Join the Discord: [FindFirst Discord](https://discord.gg/6rg8XdCHDH)
 
 ## Architecture