Fixed _download.cmd to set the minimium required security protocol types when downloading files with powershell.
Fixed _download.cmd to set the minimium required security protocol types when downloading files with powershell.

boxcutter/windows,HirotakaKato/boxcutter-windows-ja,boxcutter/windows,HirotakaKato/boxcutter-windows-ja,boxcutter/windows,HirotakaKato/boxcutter-windows-ja