[RunPod] Fix multi-gpu provisioning. (#3291)

sky/provision/runpod/utils.py

@@ -108,6 +108,7 @@ def launch(name: str, instance_type: str, region: str, disk_size: int) -> str:
         container_disk_in_gb=disk_size,
         min_vcpu_count=4 * gpu_quantity,
         min_memory_in_gb=gpu_specs['memoryInGb'] * gpu_quantity,
+        gpu_count=gpu_quantity,
         country_code=region,
         ports=(f'22/tcp,'
                f'{constants.SKY_REMOTE_RAY_DASHBOARD_PORT}/http,'