Update main.py

main.py

@@ -80,7 +80,7 @@ async def chat(prompt = "Once upon a time there was a "):
             yield chat_chunk
         yield ""
 
-    return StreamingResponse(server_sent_events(completion))
+    return EventSourceResponse(server_sent_events(completion))
 
 @app.post("/v1/chat/completions")
 async def chat(request: ChatCompletionRequest, response_mode=None):