Update app.py

app.py

@@ -52,7 +52,7 @@ class WebSearchAgent:
             description="An agent using DuckDuckGo and calculator tools.",
             tools=[duck_search, calculator],
             model="gpt-3.5-turbo",  # You can use gpt-4o if you have access
-            step_limit=5,
+            planning_interval=5,
             system_prompt=(
                 "You're a helpful reasoning agent. Use the provided tools "
                 "to help answer the user's questions accurately."