RID in .toolsetversion is wrong

[ViktorHofer]

The RID that is written into the .toolsetversion file is wrong on non Windows platforms.

From a macOS SDK:

That's because the Rid that is used here which comes from here is always Windows because the SDK repo officially builds on Windows only.

This is already fixed when building the SKD inside the VMR and I assume this would also fix itself when sdk and installer merge together and produce artifacts in a combined official leg.