This may not be the best solution because it is kind of ugly, but, use this in front of your line. A native markdown solution would be best, but I don’t know of one yet.
$\qquad$
$\qquad$The indented line would look like this.
If you come across a better solution, you can always search and replace it.
<ul>
You might can also just use the ul tag. This indents things.
</ul>
Cheers,
Clif