Update app.py

app.py

@@ -476,6 +476,7 @@ async def test_download(request: Request):
 async def get_audio_download_url(track_id: str, quality: str) -> str:
     if quality == 'mp3':
         type = 'audio'
+        quality = 128
     else:
         type = 'video'
     donwnload_url = f'https://chrunos-shadl.hf.space/yt/dl?url={track_id}&type={type}&quality={quality}'