Fix Discord invite link to use official URL from config

Author: cursoragent

app/en/get-started/setup/windows-environment/page.mdx

@@ -11,4 +11,4 @@ import { Callout } from "nextra/components";
   This page is coming soon. We're working on comprehensive documentation for setting up Arcade on Windows.
 </Callout>
 
-In the meantime, if you need help setting up Arcade on Windows, please reach out on [Discord](https://discord.gg/GRvWsZBVT9).
+In the meantime, if you need help setting up Arcade on Windows, please reach out on [Discord](https://discord.gg/GUZEMpEZ9p).