Update app.py

app.py

@@ -60,7 +60,7 @@ def get_billboard_hot_100_last_countdown() -> list:
     return top_songs
 
 @tool
-def get_cat_picture_with_name():
+def get_cat_picture_with_name() -> str:
     """A tool that searches the internet for a picture of a cat, downloads the first result, and displays it with a randomly generated name.
     """
     import requests