422 errors from the GitHub API

> `/wp-admin/admin.php?page=jetpack-beta` sometimes calls an api.github.com link which returns a 422 Unprocessable Entity error. It seems to vary though, and now I can’t replicate, but I have a screenshot from the last time I saw it:


Begin at `/wp-admin/admin.php?page=jetpack-beta` and trace the request to the `api.github.com` link, using the attached screenshot as the available failure evidence. First determine which request parameters can produce the 422 response; done means the cause is reproducible and the request no longer produces the reported error, or the response is shown to originate upstream.

Written by the indexing model from the issue text.