Update app.py

app.py

@@ -23,7 +23,7 @@ def tell_a_joke(arg1:str)-> str: #it's import to specify the return type
     Args:
         arg1: the topic
     """
-    return "Why did the giraffe think this topic was funny: " + arg1
+    return f"Why did {arg1} cross the road? It had to wait for a giraffe"
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: