SHA-256 hashes for FFmpeg binaries distributed with Secretary42

macOS arm64:
4c8a666c8619dc0599d62e0121f2b3db69d058d2855cc58494ba5a49e30451bc  ffmpeg

Windows x64:
773a96ccabfce8022753b09089983b9416c44dce081fbd77639a3f4b23efc503  ffmpeg.exe