update predictor_bias for onnx model

shixian.shi

2023-04-13 bf5eb6f5acbbdc8d8b620c0b67185f67da4a4492

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