Are smart rings dying? They were all the rage just a few months ago, with Samsung, Oura, and other brands offering up their shiny new health-tracking jewelry. But, anecdotally, I’ve noticed that this wearable genre is slowly falling out of vogue. We expected several brands to join this group in the coming months and years, potentially including Apple and Google, but the latter has resorted to something entirely different in the meantime. The Fit…