[Autoscaler][GCP] Use Python3.8 in defaults.yaml (#14417)
[Autoscaler][GCP] Use Python3.8 in defaults.yaml (#14417)


ray-project/ray,ray-project/ray,ray-project/ray,pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,pcmoritz/ray-1,ray-project/ray,pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,ray-project/ray,pcmoritz/ray-1