Update chain_app.py

chain_app.py

@@ -479,7 +479,7 @@ async def main(message: cl.Message):
         await cl.Message(
             content=model_response
         ).send()
-    elif chat_profile == "gpt4-o-omni":
+    elif chat_profile == "gpt4-o-mini":
         completion = openai_client.chat.completions.create(
             model="gpt-4o-mini",
             messages=[