I have no reason to trust that the fork itself is competently maintained when the author did not even bother to write the announcement.
But this is one of the few cases where it might be acceptable.
Author is not a native speaker; in an announcement that a known project is being forked for maintenance the occasional odd phrasing and possible errors in grammar could sound unprofessional.
I wonder if in such cases a better use of AI would be to try to write it yourself and just ask a LLM to revise instead? Maybe with some directive to "just point out errors in syntax and grammar, and factual mistakes. No suggestions on style"?