Update Lounge Category Description

Our Hub platform, Discourse, uses something called Trust Levels to manage what features people can or cannot use on the Hub.

https://blog.discourse.org/2018/06/understanding-discourse-trust-levels/

People who are circle role holders are added to the circle role holders group and automatically promoted to Trust Level 4 so they can do things like edit posts, flag posts, etc. As a result, they also get access to our #lounge, a closed category that is available only to Trust Level 3 and higher members.

The current category description for the Lounge doesn’t make a lot of sense given the way our members get to Trust Level 4 and so should be edited.

https://hub.youthpowercoalition.org/t/welcome-to-the-lounge/8