Can you update Apple Wireless Keyboard (A1314) with MacOS?

Hey, I just dug out an old A1314 (bluetooth Apple Wireless Keyboard) and I’m trying to use it with my M1 MacBook Air. It connects, but show the firmware at 0.5.0. I know there’s an update, but the update utility on Apple’s website doesn’t work (gives me an error message “Your keyboard does not need this update. It already has the updated functionality”). Any idea how to update the firmware? Do I need an older Mac? Thanks for any help.