update readme, for start grpc server and client

huangmingming

2023-01-29 31096e8896697c7721e3aa75e20f0b03f7c3d9d7

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