feat(site): for mobile we want to defer loading this image

It's not above the fold on mobile devices

Author: Vheissu

themes/aurelia-theme/layouts/index.html

@@ -3,7 +3,7 @@
 <section class="home-screen">
   <div class="hero">
     <div class="left">
-      <img class="logo-icon" src="{{ "aurelia-icon.svg" | relURL }}" alt="Aurelia" width="150" height="150" fetchpriority="high" />
+      <img class="logo-icon" src="{{ "aurelia-icon.svg" | relURL }}" alt="Aurelia" width="150" height="150" fetchpriority="high" loading="lazy" />
     </div>
 
     <div class="right">