Fix key-bindings.md example (#11415)

Fixed obselete command name in keymap example.
From "zed::OpenKeyMap" to "zed::OpenKeymap".



Release Notes:

- N/A
bc292186cdsebbeutler committed on 5/13/2024, 4:09:59 PM· committed by GitHubparent2e8197c
1 file changedLine totals unavailable