markdown preview: Handle line breaks in between task list items correctly (#9795)

Closes #9783 

Release Notes:

- Fixed task list rendering when there was a line break between two list
items ([#9783](https://github.com/zed-industries/zed/issues/9783))
db9221aa57Bennet Bo Fenner committed on 3/26/2024, 10:12:57 AM· committed by GitHubparent157fb98
1 file changedLine totals unavailable