Need a way to accept documentation contributions to GitHub Wiki

[felker]

GitHub Wikis cannot take PRs at this time, and editing is currently restricted to those with push permissions on the main repo. The only toggleable setting is to disable "Restrict editing to users in teams with push access only (Public wikis will still be readable by everyone.)" but that would let anyone with a GitHub account edit the pages directly, which is obviously not an option.

It would be great to accept contributions from the community to improve our documentation.

Is there any better way than just posting raw markdown in a PR description?