Fix the smoke test.

Author: wpietri

plugins/openai/modelgauge/suts/openai_client.py

@@ -130,7 +130,7 @@ def _translate_request(self, messages: List[OpenAIChatMessage], options: SUTOpti
             messages=messages,
             model=self.model,
             frequency_penalty=options.frequency_penalty,
-            max_completion_tokens=options.max_tokens,
+            max_tokens=options.max_tokens,
             presence_penalty=options.presence_penalty,
             stop=options.stop_sequences,
             temperature=options.temperature,