The first time I did this I remember notifying somebody. I can’t find the chat transcript now, I thought it happened in the bitcoin dev IRC channel, but maybe not? I also reported the problem to Github, although it may have been specifically to a developer I know that works there.
At some point, the problem appeared fixed, I was no longer the author. A few weeks/months ago I was able to attribute myself again as the author, using exactly the same method as the first time.
What you want to do about this is up to you. You could create a new account, or assign it to one of your own accounts. Or wait for Github to fix the issue.