Update app.py

app.py

@@ -94,7 +94,7 @@ def fill_up_placeholders(txt):
 
 async def rollback_last(
     idx, local_data, chat_state,
-    global_context, res_temp, res_topk, res_toppo, ctx_num_lconv,
+    global_context, res_temp, res_topk, res_topp, ctx_num_lconv,
     internet_option, serper_api_key
 ):
     internet_option = True if internet_option == "on" else False