message: docs: use the right tag in the HeroesComponent's template snippet
  Based on the tutorial content of the Hero Editor, the tag to be used in
  HeroesComponent's template snippet should be h2 and not h3.
  PR Close
diff: <!-- #enddocregion show-hero-1 -->
  <!-- #docregion show-hero-2 -->
  -<h3>{{hero.name}} Details</h3>
  +<h2>{{hero.name}} Details</h2>
  <div><span>id: </span>{{hero.id}}</div>
  <div><span>name: </span>{{hero.name}}</div>
  <!-- #enddocregion show-hero-2 -->
  