Update app.py

app.py

@@ -498,7 +498,10 @@ def get_description() -> str:
     return ""
 
 
-def fetch_avatar_bytes() -> bytes | None:
+# def fetch_avatar_bytes() -> bytes | None:
+from typing import Optional
+
+def fetch_avatar_bytes() -> Optional[bytes]:
     """Get latest profile photo of the bot as bytes (or None if unavailable)"""
     try:
         me = requests.get(f"{TELEGRAM_API}/getMe", timeout=5).json()