fix auto detect lang not working

app.py

@@ -12,7 +12,7 @@ def transcribe(audio, state={}, delay=1.2, lang=None, translate=False):
 
     transcription = model.transcribe(
         audio,
-        language = lang if lang != "auto" else None
+        language = lang if lang != AUTO_DETECT_LANG else None
     )
     state['transcription'] += transcription['text'] + " "