Update reference to keymap.json in tasks docs (#11711)

I assume this was an older file name or just a typo as I can't find any
other references to a `keybindings.json` file. Either way it was
confusing for a bit :)

Release Notes:

- N/A
6657e301cdErik Simmler committed on 5/12/2024, 11:55:19 AM· committed by GitHubparentf990f70
1 file changedLine totals unavailable