code: func UpgradeRelease(req *rudderAPI.UpgradeReleaseRequest) (*rudderAPI.UpgradeReleaseResponse, error) {
  	conn, err := grpc.Dial(grpcAddr, grpc.WithInsecure())
  	if err != nil {
  		return nil, err
  	}
  	defer conn.Close()
  	client := rudderAPI.NewReleaseModuleServiceClient(conn)
  	return client.UpgradeRelease(context.Background(), req)
  }
docs: // UpgradeRelease calls Rudder UpgradeRelease method which should perform update