Replace dummy user emails with @example.com

[gthayer]

Description of the Change

Replaces dummy with emails with a safe, fake alternative. ex: sarkill2@usnews.com -> sarkill2@example.com.

This removes any confusion as to whether these users are real, and prevents erroneous delivery to fake email addresses.

Closes # N/A

How to test the Change

Run a scrub using the updated data.csv. Dummy users will have @example.com addresses.

Changelog Entry

Changed - Replaced dummy user emails with @example.com.

Credits

Props @gthayer, @tott

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change. <-- Does this project have any tests?
• All new and existing tests pass. <-- See Above.