Update notifications that can’t be turned off seem to be a touchy subject here.
I can only suggest doing a custom build of CE rather than using an official one.
Our developers here spend a lot more time than the couple of minutes it would take you to upgrade to create these releases.
Our stable releases are roughly every 2 months, not every week, it won’t kill you to use the few minutes you used to create the 2 posts that you have to complain to update instead.