Improve wording in collab channels filter tooltip (#52531)
Joseph T. Lyons
created
I heard a comment that `active` didn't really explain what this filter
was for, and I've had the same feeling. I think `occupied` makes it more
clear.
## Self-Review Checklist
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- [x] I've reviewed my own diff for quality, security, and reliability
- [ ] Unsafe blocks (if any) have justifying comments
- [ ] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [ ] Tests cover the new/changed behavior
- [ ] Performance impact has been considered and is acceptable
Release Notes:
- N/A