Switch to custom patched build for ffmpeg

deployment/windows/build-jellyfin.ps1

@@ -51,7 +51,7 @@ function Install-FFMPEG {
         Write-Warning "FFMPEG will not be installed"
     }elseif($Architecture -eq 'x64'){
          Write-Verbose "Downloading 64 bit FFMPEG"
-         Invoke-WebRequest -Uri https://ffmpeg.zeranoe.com/builds/win64/shared/ffmpeg-4.0.2-win64-shared.zip -UseBasicParsing -OutFile "$tempdir/ffmpeg.zip" | Write-Verbose
+         Invoke-WebRequest -Uri https://repo.jellyfin.org/releases/server/windows/ffmpeg/jellyfin-ffmpeg.zip -UseBasicParsing -OutFile "$tempdir/ffmpeg.zip" | Write-Verbose
     }else{
          Write-Verbose "Downloading 32 bit FFMPEG"
          Invoke-WebRequest -Uri https://ffmpeg.zeranoe.com/builds/win32/shared/ffmpeg-4.0.2-win32-shared.zip -UseBasicParsing -OutFile "$tempdir/ffmpeg.zip" | Write-Verbose