Adjust tab size for Markdown (#8079)

This PR sets the `tab_size` for Markdown to 2 spaces.

This should prevent Prettier from adding a bunch of leading whitespace
when formatting Markdown lists.

Release Notes:

- N/A
33ecb424afMarshall Bowers committed on 2/20/2024, 6:15:14 PM· committed by GitHubparent91b9738
1 file changedLine totals unavailable