Nested numbered lists broken in Gists

Nested numbered lists seem to not be recognized in gists.

Check out a minimal example here: https://gist.github.com/wolf99/fa4048c083d97340b5dfe31573579806

It works on GitHub main and in issues, as can be seen here:

1. This is a list item
1.1. This is a correctly nested numbered list item
2. This is a list item