Roon OS version 1.0 (build 254) is the latest version of Roon OS. This is fine. It is the basic operating system and changes rarely. This version was released on November 9, 2022:
The Roon (Server) version on the Nucleus should be version 2.0 (build 1234), and this is the more relevant one. Does it show this when you check in the Settings under About in your app? If yes, everything is OK.
If you are experiencing any problems, please let us know what they are.
EDIT: See the good point by @bearFNF in the post below regarding the switching to Nucleus