Update username to valid reference since removals

Due to gitlab-com/www-gitlab-com@75468dfa , specs started to fail. This change updates the username reference to one that is currently valid

Action items

• (If applicable) Add documentation to the handbook pages for Triage Operations =>
• (If applicable) Identify the affected groups and how to communicate to them:
  • /cc @person_or_group =>
  • Relevant Slack channels =>
  • Week-in-review

Closes #764 (closed)