JiraConverter: Mixed lists rendered incorrectly

[znerd]

When converting mixed lists (ordered inside unordered, or the other way around) to Jira format, the list item prefix is incorrect.

For example, an unordered list inside an ordered list should be rendered like this:

# Level one is ordered
#* Level two is unordered

However, the Jira extension (v0.62.2) renders it like this:

# Level one is ordered
*# Level two is unordered

I can submit a test case and a fix, via a PR.