modify paraformer train doc (#1427)

seanzhang-zhichen

2024-03-05 9595a9432fadfbdacd4e6897f6b9a83957699558

 funasr/models/normalize/utterance_mvn.py

@@ -3,8 +3,9 @@
import torch

from funasr.models.transformer.utils.nets_utils import make_pad_mask
from funasr.register import tables


@tables.register("normalize_classes", "UtteranceMVN")
class UtteranceMVN(torch.nn.Module):
    def __init__(
        self,