This is a really interesting situation. Even though this isn't a content update, it's still a pretty significant update for a game that has nobody left on the development team, which is almost a "ghost in the shell" scenario on its own. I'm guessing the work from this was done largely by Intel and/or AMD. And it makes sense why they'd be pushing out updates for a game that the studio has stopped working on; people still use CP77 to show off the capabilities of their high-end PCs, which is free advertising for these guys.
I just love that we got to see Cyberpunk go from "so broken that it was pulled from stores" to "THE benchmark game".