message: fix(challenges.yml): fix challenge description
diff: -
  name: 'Username XSS'
  category: 'XSS'
  - description: 'Perform an XSS attack on the username section of the user profile page'
  + description: 'Perform an XSS attack with <code>&lt;script&gt;alert(`xss`)&lt;/script&gt;</code> on the username section of the user profile page'
  difficulty: 3
  hint: 'Sometimes a bit of space is all we need.'
  hintUrl: ''
  