Use `ctrl-:` instead of `ctrl-shift-:` for inlay hints toggling (#2921)

The latter is not possible to press in Zed, since `:` is typed as
`shift-;` with typical US keyboard layouts.

In the end, it's the same buttons you have to press to toggle the inlay
hints, but working this time.

Release Notes:

- N/A
fad595dca6Kirill Bulatov committed on 8/31/2023, 9:10:45 AM· committed by GitHubparents897adb6af665cc
1 file changedLine totals unavailable