Add international data policy examples

[jt14den]

How could the content be improved?

As a follow-up to the discussion at the March 14 meeting with the LC Curriculum Advisory Committee:

Add examples of relevant non-US data policies and laws to the lesson (e.g., the GDPR for the EU and/or the POPI Act for S. Africa). These could be added to the lesson where they're relevant and/or incorporated in the instructor notes. Overall, before moving to the Library Carpentry repo, the lesson should be edited to ensure it's addressed to an international audience.