Change default Markdown tab size (#8080)

Marshall Bowers created

Following up to #8079, this PR changes the default Markdown tab size to
2 spaces.

This should produce less surprising formatting for lists when using
Prettier.

Release Notes:

- Changed default Markdown tab size to 2 spaces.

Change summary

assets/settings/default.json | 1 +
1 file changed, 1 insertion(+)

Detailed changes