Update app.py

Removed self from the input argument of display_youtube_trends

app.py

@@ -53,7 +53,7 @@ def get_trending_videos() -> list[dict]:
         return None
 
 @tool
-def display_youtube_trends(self) -> None:
+def display_youtube_trends() -> None:
     """
     Display the current YouTube trends in a formatted way.
     """