How can I make a pull request for a wiki page on GitHub?

I saw a wiki page on GitHub that isn't open for editing. Then I forked the project, edited it on "my end" and tried to do a pull request. It turns out, the wiki isn't in the project, and there isn't a way to commit changes to it. Other than e-mailing, is there a way to proceed if I want to suggest a change on the wiki in this case? At this point I found out what seems like an alternative under "Qu