I'd look at it as not "your" post, and ideally wouldn't have an individual author, it'd be written by the comm not a specific person AFA display and similar-I'd not want my name attached to a post rewritten by someone else, but I'd have zero trouble with an official "read this" post be edited by anyone given the authority to do so.

So either have such posts be written by the comm, or have authorship reassigned if an edit is done by a different admin?