Use `anyOf` instead of `oneOf` in keymap schema (#47248)

Closes #ISSUE

Resolves some spurious warnings we were seeing in the keymap file due to
keybind declarations matching multiple possible shapes which is not
allowed with `oneOf` per the json-schema spec

Release Notes:

- N/A *or* Added/Fixed/Improved ...
9c3dc216c6Ben Kunkle committed on 1/20/2026, 9:03:17 PM· committed by GitHubparentcd0b373
1 file changedLine totals unavailable