Add suppression for markdown-it ReDoS vulnerability
See https://github.com/advisories/GHSA-6vfc-qv3f-vr6c
Limited impact since only ReDos based on controlled input. Fix has been committed, but not released.
See https://github.com/advisories/GHSA-6vfc-qv3f-vr6c
Limited impact since only ReDos based on controlled input. Fix has been committed, but not released.