keymap: Document conflicting macos ctrl-shift-space shortcut (#28325)

Closes https://github.com/zed-industries/zed/issues/26261

Release Notes:

- N/A
cc15598e09Peter Tripp committed on 4/8/2025, 2:46:03 PM· committed by GitHubparent7ee9109
1 file changedLine totals unavailable