fix LfrCmvn for paraformer (#1097)

Yabin Li

2023-11-16 0c68c942fe84567c48f62b59a0bc0e60d0b29b15

1
{"unk_token": "<|endoftext|>", "bos_token": "<|endoftext|>", "eos_token": "<|endoftext|>", "add_prefix_space": false, "model_max_length": 1024, "special_tokens_map_file": null, "name_or_path": "gpt2", "tokenizer_class": "GPT2Tokenizer"}