Fix line number settings migration (#41351)

Follow-up to https://github.com/zed-industries/zed/pull/39268

Also updates the documentation.

Release Notes:

- N/A
bd0bcdb0edFinn Evers committed on 10/28/2025, 8:08:49 AM· committed by GitHubparent2b56991
2 files changedLine totals unavailable