報告ありがとうございます @DanEss 
以下のPRで修正されます
FIX: Follow GitHub API redirects for renamed and transferred repos by ZogStriP · Pull Request #44488 · discourse/discourse · GitHub
UX: Allow `code` tags in admin notice messages by ZogStriP · Pull Request #44489 · discourse/discourse · GitHub
FIX: Only count commits from configured repos for GitHub badges by ZogStriP · Pull Request #44490 · discourse/discourse · GitHub
FEATURE: Report GitHub token and repo problems on the admin dashboard by ZogStriP · Pull Request #44491 · discourse/discourse · GitHub