GNOME 45.1 is designed to be a boring bugfix update for GNOME 45, so it should be a safe and uneventful upgrade from earlier versions of GNOME 45. Enjoy!
I’m curious why mutter didn’t get a 45.1 tag. There are a substantial number of regressions and crashes that have been fixed in the gnome-45 branch.
I’m actually not aware of a single distro that has updated to GNOME 45 that doesn’t either use a commit from the gnome-45 branch itself to build from or doesn’t carry at least a few patches for the most common crashes.
Core modules are not expected to follow the schedule for stable releases. Instead, please release when you judge that a new stable release is required. Modules released before this deadline will be included in the 45.1 update of the GNOME runtime.
gnome-shell and mutter are typically released, in unison, asynchronous to the Gnome Schedule.