Fix the command to teardown the test cluster in the GKE developer (#916)
Fix the command to teardown the test cluster in the GKE developer (#916)

instructions.
googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones