change lm task name

wucong.lyb

2023-02-17 6f9c735c7f3cd690a375da4696ea3a161ea72e27

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beam_size: 10
penalty: 0.0
maxlenratio: 0.0
minlenratio: 0.0
ctc_weight: 0.5
lm_weight: 0.7