message: fix(aio): improve no-javascript screen
diff: <aio-shell></aio-shell>
  <noscript>
  - <header class="background-sky">
  - <div class="background-superhero-paper hero is-large">
  - <img class="hero-logo" src="assets/images/logos/angular/angular.svg" alt="Angular" />
  - <h1 class="text-headline">One framework.<br>Mobile &amp; desktop.</h1>
  - <br />
  - <h3 style="color:yellow">
  - This website requires JavaScript.
  - </h3>
  + <div class="background-sky hero"></div>
  + <section id="intro">
  + <div class="hero-logo">
  + <img src="assets/images/logos/angular/angular.svg" width="250" height="250">
  </div>
  - </header>
  + <div class="homepage-container">
  + <div class="hero-headline">One framework.<br>Mobile &amp; desktop.</div>
  + </div>
  + <h2 style="color: red; text-align: center;">
  + <b><i>This website requires JavaScript.</i></b>
  + </h2>
  + </section>
  </noscript>
  </body>
  </html>
  