Adjusted the Discord link in the README

* Follow up to 12ca9a0.
* Adjusted the link to a human readable format.

README.md

@@ -161,7 +161,7 @@ Examples:
 	* Web Chat: https://rathena.org/board/page/chat.html
 
 * rAthena Discord Chat
-	https://discord.gg/0XP9qqhUV9GLSfCh
+	https://discord.rathena.org
 
 * rAthena Wiki
 	https://rathena.org/board/index.php?app=ipbwiki