Delete unexpected end

[kyanny]

Hi @kenn, I found a small syntax error in the Vagrantfile example. Inner end shouldn't be there.
ref: Inline Scripts

$ cat Vagrantfile
# -*- mode: ruby -*-
# vi: set ft=ruby :

Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/focal64"
  config.vm.provision "shell",
    inline: "sudo echo 'root:vagrant' | /usr/sbin/chpasswd"
  end
end

$ vagrant up
Vagrant failed to initialize at a very early stage:

There is a syntax error in the following Vagrantfile. The syntax error
message is reproduced below for convenience:

/Users/kyanny/workspaces/tmp-sunzi/Vagrantfile:9: syntax error, unexpected `end', expecting end-of-input

[kyanny]

CI failed due to the thor version dependency. #46 fixes it. This branch needs to be rebased once #46 has been merged.