fix websocketsrv.cpp for new apis

lyblsgo

2023-05-10 9eaa9de61afdeb384825a2d6f9bcc2122c9a0804

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