Update SDK_advanced_guide_online.md

Yabin Li

2023-08-11 61235e78dcbadf2e63b92449e75cc1e322c5f6ab

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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