Update CODE_OF_CONDUCT.md

Changed the mail address to the Discord server

CODE_OF_CONDUCT.md

@@ -60,7 +60,7 @@ representative at an online or offline event.
 
 Instances of abusive, harassing, or otherwise unacceptable behavior may be
 reported to the community leaders responsible for enforcement at
-[kobedo11@gmail.com](mailto:kobedo11@gmail.com).
+[our Discord server](https://discord.gg/T5vZU6UyeG).
 All complaints will be reviewed and investigated promptly and fairly.
 All community leaders are obligated to respect the privacy and security of the
 reporter of any incident.