Up until now, Emby was using a versioning scheme that when the 3rd digit was a 0, it meant it was a beta release. (This was pointed out by another user couple years back).
It seems that this is not longer the case, or 4.9.1.0 is a stable release, but Emby didn’t marked it as such in their release channels.
If you can find me a description of their versioning scheme, I can try to update the bot to skip non-stable releases. I was unable to find such description.