Remove `!menu` from `j k` binding in initial keymap examples (#34959)

See
https://github.com/zed-industries/zed/pull/34912#issuecomment-3108802582

Release Notes:

- N/A
3b428e2eccMichael Sloan committed on 7/23/2025, 5:33:40 PM· committed by GitHubparent986b446
1 file changedLine totals unavailable