fix linting

Author: leehuwuj

templates/types/multiagent/fastapi/app/api/routers/vercel_response.py

@@ -59,7 +59,7 @@ async def content_generator(
         async def _chat_response_generator():
             result = await task
             final_response = ""
-            
+
             if isinstance(result, AgentRunResult):
                 for token in result.response.message.content:
                     yield VercelStreamResponse.convert_text(token)