Add rule regarding alt accounts (#302)

Adds a rule regarding the disallowing of alt accounts as is standard practice in most communities.

docs/other/moderation/rules.md

@@ -25,6 +25,7 @@ This is a public server that anyone is welcome to join. As such, we expect every
 **14. Good manners.** This means strictly no topics that would divert or derail the current conversation being held, especially those of sexual innuendos.
 **15. No hating/flaming about moderation decisions**. If you want to discuss moderation decisions (bans, mutes, changes, ...) please open a staff only ticket in #help . Harassing a mod will get you banned.
 **16. Follow Discord ToS**. If Discord doesn't allow it, we won't allow it either.
+**17. No alts**. Alt accounts are not allowed. Note that as we cannot track everyone and their accounts we might miss some so we rely on your help for reporting.
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 **Ban Guidelines**
@@ -48,7 +49,7 @@ Please note:
 **Staff and Other VIPs may be exempt** (to some extent) from any of these rules due to their reputation in the community, if you feel like they should be warned for a violation you should report to staff
 
 For questions regarding Discord's Privacy Policy or Terms of Use, please refer to the documents here (<https://discord.com/terms>)
-`Last Updated: 2024-07-14`
+`Last Updated: 2024-08-15`
 <https://discord.gg/northstar>
 
 New users, **you can go to #installation to find out how to install Northstar** as well as read the FAQ if you have any questions