Update core team group path

This is the counterpart for triage-ops!832 (merged)

/cc @gitlab-org/gitlab-core-team/community-members

@markglenfletcher Please review? Thanks!

Action items

• When adding a new Triager, verify that it has been added to the DEFAULT_TRIAGERS in triage/triage/handler.rb in the appropriate order.
• If applicable, identify the affected groups and how to communicate to them:
  • /cc @person_or_group =>
  • Relevant Slack channels =>
  • Week-in-review