Update app.py

app.py

@@ -92,7 +92,7 @@ def user_ask(state, chatbot1, chatbot2, textbox):
     # Updating state with the current ELO ratings
     state["elo_ratings"] = read_elo_ratings()
     if "history" not in state:
-        state.update({'history': [])
+        state.update({'history': []})
     state["history"].extend([
         {"role": "user", "content": user_input}])
     # Chat with bots