We unfortunately cannot only update that single assembly. Have differing versions of dependent assemblies in Rhino as that can cause multiple versions of these strong named assemblies being loaded, causing all sorts of problems at runtime, especially when using Rhino.Inside (but not limited to).
In this case, we include it as a dependency of Microsoft.CodeAnalysis.* and possibly others. We would also have to update all of these to version(s) that depend on that exact version, and all other assemblies that also depend on all of those assemblies, and so on.
I am working on RH-80178, which I hope can start to resolve some of these issues in .NET 7, but in .NET 4.8 you’d still be stuck.
If you can list the package(s) you are trying to use, we can try to figure out a way to get that going either as things are, or determine if we need to update all assemblies that depend on it in Rhino.