Update ArchLinux installation instructions
Update ArchLinux installation instructions

asciinema/asciinema.org,asciinema/asciinema.org,asciinema/asciinema-server,asciinema/asciinema-server,asciinema/asciinema-server,asciinema/asciinema-server,asciinema/asciinema.org,asciinema/asciinema.org