Fix "Unable to find module 'ripienaa/puppet-module-data' on https://github.com"

Typo in module address, I believe "ripienaar/puppet-module-data" is correct. This causes boxen to fail on librarian like:
````
Unable to find module 'ripienaa/puppet-module-data' on https://github.com
Can't run Puppet, fetching dependencies with librarian failed.
````