Update app.py

app.py

@@ -230,7 +230,7 @@ def save_conversation(chat_histories, session_id):
         st.error(f"Error during Git operations: {e}")
 
 # Combine chat histories from all pages
-def combine_chat_histories(all_chat_histories)
+def combine_chat_histories(all_chat_histories):
     all_chat_histories = [
             st.session_state['chat_history_page1'],
             st.session_state['chat_history_page2'],