Fix sign in disclaimer to accurately show trial benefits (#55964)

Self-Review Checklist:

- [ x] I've reviewed my own diff for quality, security, and reliability
- [x ] Unsafe blocks (if any) have justifying comments
- [x ] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [x ] Tests cover the new/changed behavior
- [x ] Performance impact has been considered and is acceptable

Release Notes:

- N/A
a6f41d1b83Katie Geer committed on 5/7/2026, 3:43:43 PM· committed by GitHubparent5fc8a83
2 files changedLine totals unavailable