Typo Files directory for Puppet modules in Puppet Guide

Note that in Section 2.9 of the Puppet Guide, it says to: Create file named index.html in the files directory.

However the "files" directory does not exist yet and was not created automatically by the "puppet module generate" command:

  puppet module generate [module-name]

The files directory should be created within the module's named directory. It is presumed that any "files" directives in a puppet module named "mymodule" will reference the files from within "~puppet-path~/modules/mymodule/files" directory.