not support Chinise-raw-txt input

[alisakgg]

bash demo.sh --stage 2 --model_name ${model_name} --output_dir results --text "你好"
--prompt_text "one of these is context" --prompt_audio "demo/8230_279154_000013_000003.wav" not support， self.phoneme_tokenizer uses g2p_en to convert english word into phn，is the model support Chinese inputs

[ZhihaoDU]

Currently, the released LauraTTS model is trained on the LibriTTS corpus. I think it is not able to synthesize Chinese directly. The Chinese synthesis model is under internal development and test. We may release it in the future.