Fix repo docs (#63486)

* ensures The Rule cannot be accidentall removed
* fixes the perf command example to capture call graphs, to avoid
round-trips like
https://github.com/zed-industries/zed/issues/59689#issuecomment-5453623044
(samples without call graphs are not quite usable for investigating bugs
like these)


Release Notes:

- N/A
6840b8d2fcKirill Bulatov committed on 8/31/2026, 11:00:40 AM· committed by GitHubparentbce0c57
2 files changedLine totals unavailable