workshop: don't promise the dead-helper FAIL in exercise 2

A second test run resolved the conflicts and deleted the dead helper
unprompted. Present the verify script as covering both outcomes: FAIL
gets the follow-up prompt, PASS outright means the agent carried the
intent whole. The check being independent of the agent is the lesson
either way.

Change-Id: I716680ec66c1f3eced913599255aae0adce4da8a