Fix typo in --help output

[mhansen]

It says

Commands:
  list-file   Lists a zip file
  unzip-file  Unzip a zip file
  list-uri    Lists a zip file from a URI
  unzip-uri   Unzips a zip file from a URO
  help        Print this message or the help of the given subcommand(s)

URO seems like a typo

[adetaylor]

Thanks!