Auto-Update FFmpeg

[Obegg]

The latest commit shinchiro/mpv-winbuild-cmake@1e2c139 adds FFmpeg to https://github.com/shinchiro/mpv-winbuild-cmake/releases

Will it be possible to add FFmpeg as Auto-Update the same way it's updating mpv and yt-dlp?
(Here: https://github.com/shinchiro/mpv-packaging/blob/master/mpv-root/installer/updater.ps1)

Also - Since FFmpeg is named ffmpeg_x64.exe, I would love to have to option that it will auto-rename it to ffmpeg.exe since Windows, or other applications that use FFmpeg won't be able to find it unless it's named ffmpeg.exe

[shinchiro]

old settings.xml file should be deleted to let new updater generate new xml with ffmpeg support