Do not indent on enter in python comments ending in colon (#25437)

Closes https://github.com/zed-industries/zed/issues/25416

Release Notes:

- Fixed a bug where indentation was applied when adding a newline to a
Python comment ending in `:`.
535ba75bc7Joseph T. Lyons committed on 2/24/2025, 4:11:22 AM· committed by GitHubparentee280b0
1 file changedLine totals unavailable