Add disclaimer about Discord nickname being set to real name

[tanzimfh]

Describe Problem

People are sometimes shocked to see their real name on the server: https://discord.com/channels/453373412707008522/453397009534287873/1300505102771294320

Suggest Solution

There could be some text on https://css.uwindsor.ca/discord like Note: Your name on the Discord server will be set to <full name>.

The name should be available when the user is logged into their UWin account.