message: Fix hint link
  (Anchor is always the relevant part of the challenge `description`)
diff: category: 'Improper Input Validation'
  description: 'Get registered as admin user.'
  difficulty: 3
  - hint: 'Assign the Unassignable.'
  - hintUrl: 'https://bkimminich.gitbooks.io/pwning-owasp-juice-shop/content/part2/improper-input-validation.html#register-as-admin-user'
  + hint: 'Assign the unassignable.'
  + hintUrl: 'https://bkimminich.gitbooks.io/pwning-owasp-juice-shop/content/part2/improper-input-validation.html#get-registered-as-admin-user'
  key: registerAdminChallenge
  