update: xai增加max_tokens,max_words等参数

maubot_llmplus/thrid_platform.py

@@ -171,6 +171,7 @@ class XAi(Platform):
     async def list_models(self) -> List[str]:
         # 调用openai接口获取模型列表
         full_url = f"{self.url}/v1/models"
+        headers = {'Authorization': f"Bearer {self.api_key}"}
         async with self.http.get(full_url) as response:
             if response.status != 200:
                 return []