update AverageShiftCalculator in utils

shixian.shi

2023-03-13 71d466e7451435eefb604f22576aba04bd39e285

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