[MERGE THIRD] Use smartdown version with markdown public API

Update smartdown version with the changes to the api - returning markdown instead of html.

We may want to hold off merging this and bump to 0.11.2 instead as that version has a couple of bug fixes (although I do not think they are manifested anywhere in smart-answers), we would need to create a separate version bump commit anyway)
I agree, I didn't go back and remove the `@smartdown_question` at the start of the line though :sob: