Update app.py

app.py

@@ -24,7 +24,7 @@ def whisper_speech_demo(text, lang, speaker_audio, mix_lang, mix_text):
     pipe = Pipeline()
     speaker_url = speaker_audio if speaker_audio is not None else None
 
-   if mix_lang and mix_text:
+    if mix_lang and mix_text:
         mixed_langs = mix_lang 
         mixed_texts = mix_text.split(',')
         stoks = pipe.t2s.generate(mixed_texts, lang=mixed_langs)