fixed url typo

Author: samadwar

src/sagemaker_studio_docker_cli/commands.py

@@ -21,7 +21,7 @@ def ping_host(home, instance_type, instance_id, dns, port, retry=True):
         log.info(f"Pinging {dns}")
         path_to_cert = f"{home}/.sagemaker_studio_docker_cli/{instance_type}_{instance_id}/certs/client/"
         cert=(path_to_cert + "cert.pem", path_to_cert + "key.pem")
-        response = json.loads(requests.get(f"https://{dns_address}:{port}/version", cert=cert, verify=False).content.decode("utf-8"))
+        response = json.loads(requests.get(f"https://{dns}:{port}/version", cert=cert, verify=False).content.decode("utf-8"))
         log.info(f"DockerHost {dns} is healthy!")
         return (True, None)
     except Exception as error: