Arc Raiders’ next big update, Frozen Trail, is set to arrive sometime in October. For Embark Studios, it means more than it probably should. The team announced back in the spring that it would move to semi-annual major updates, pivoting away from the monthly content cadence that Arc Raiders’ executive producer Aleksander Grøndal told me wasn’t good enough for players or developers. That leaves a lot riding on Frozen Trail, and it will serve as a litmus test for what’s…