Update app.py

app.py

@@ -141,7 +141,7 @@ group_chat = GroupChat(
     agents=[food_recognizer, size_estimator, nutrition_fetcher, orchestrator],
     messages=[],
     max_round=4,
-    select_speaker=custom_select_speaker  # Use custom speaker selection instead of LLM
+    speaker_selection_method=custom_select_speaker  # Use custom speaker selection instead of LLM
 )
 manager = GroupChatManager(groupchat=group_chat)