[TTS]Vits Available Model List needs to be updated
Hello. I want to have a trial finetuning the newly updated Vits model in TTS module.
Trying to follow the instructions on:
https://catalog.ngc.nvidia.com/orgs/nvidia/teams/nemo/models/tts_en_lj_vits

But got the error of:
FileNotFoundError: Model tts_en_lj_vits was not found. Check cls.list_available_models() for the list of all available models.

Because currently print(VitsModel.list_available_models()) is an empty list.
This seems similar to the error in Tacotron2 I encountered last time here:
https://github.com/NVIDIA/NeMo/issues/5714

Thank you!