Please provide a simple example for voice cloning.

With **coqui-tts** I do:
```
from TTS.api import TTS
tts = TTS("tts_models/multilingual/multi-dataset/xtts_v2").to("cpu")
t=open('text.txt', 'r').read().replace('\n','')
tts.tts_to_file(text=t, speaker_wav="./speaker.mp3", language="en", file_path="test.wav")
```

but with styletts2 ?