Now using Zstandard instead of xz for package compression

Now using Zstandard instead of xz for package compression

This does NOT concern the users ofArcoLinux or Arch Linux  This does concern the packagersArcoLinuxB or Carli Arch Linux decided to change the format of the packaging from pkg.tar.xz to pkg.tar.zst. I let you read the official message from Arch Linux. See image above....