Update websocket_protocol_zh.md

Yabin Li

2023-09-01 b3ab0064524fff88d3c48c5abfa3e4258d44edb0

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wget https://isv-data.oss-cn-hangzhou.aliyuncs.com/ics/MaaS/ASR/dep_libs/ffmpeg-N-111383-g20b8688092-linux64-gpl-shared.tar.xz
tar -xvf ffmpeg-N-111383-g20b8688092-linux64-gpl-shared.tar.xz