fix: zstd compression for squasfs, fix motd URL

airootfs/etc/motd

@@ -1,7 +1,7 @@
 Antergos NeXT - A modern, elegant Linux distribution revived.
 
 Sources:
-https://github.com/antergos/antergos-iso-next
+https://github.com/Antergos-NeXT/antergos-iso
 
 Arch-ISO Source:
 https://gitlab.archlinux.org/archlinux/archiso

profiledef.sh

@@ -15,7 +15,7 @@ bootmodes=('bios.syslinux' 'uefi.systemd-boot')
 arch="x86_64"
 pacman_conf="pacman.conf"
 airootfs_image_type="squashfs"
-airootfs_image_tool_options=('-comp' 'xz' '-Xbcj' 'x86' '-b' '1M' '-Xdict-size' '1M')
+airootfs_image_tool_options=('-comp' 'zstd' '-Xcompression-level' '16' '-b' '1M')
 file_permissions=(
   ["/etc/shadow"]="0:0:400"
   ["/etc/gshadow"]="0:0:400"