Wow, that is absurd. Did you ever follow up with the employee who sent you a note? What did flagging entail? I.e., were you not able to use the repo?
As she appeared to be a non-technical person mysteriously employed by GitHub as some consolation to some organization (IIRC it was called the "Ada Initiative") I realized that github is no longer a technology company. It's a Social Justice company. Good luck to them--I don't even disagree with the basic premise--but I like my git repo companies to be worried about git.