fixed:delete expense tool workflows

Author: mahady13

allinone.py

@@ -156,7 +156,7 @@ def delete_expense_tool(expense_id:str,config:RunnableConfig):
     user_id=config["configurable"]["user_id"]
     result=get_expenses(user_id,expense_id)
     if result:
-        return {f"{expense_id} is ready for deletion"}
+        return f"{expense_id} is ready for deletion"
     return f"{expense_id} is not available or user has no authority"
 
 @tool