Update app.py

app.py

@@ -6,10 +6,10 @@ from optillm.mcts import chat_with_mcts
 from optillm.bon import best_of_n_sampling
 
 def respond(
-    model,
-    approach,
     message,
     history: list[tuple[str, str]],
+    model,
+    approach,
     system_message,
     max_tokens,
     temperature,