Move homepage-hero.svg and improve compression

site/layouts/partials/home/masthead.html

@@ -2,7 +2,7 @@
   <div class="container px-4 px-md-3">
     <div class="row align-items-lg-center">
       <div class="col-8 mx-auto col-md-4 order-md-2 col-lg-5">
-        {{ partial "homepage-hero.svg" (dict "class" "img-fluid mb-3 mb-md-0" "width" "600" "height" "533") }}
+        {{ partial "icons/homepage-hero.svg" (dict "class" "img-fluid mb-3 mb-md-0" "width" "600" "height" "533") }}
       </div>
       <div class="col-md-8 order-md-1 col-lg-7 text-center text-md-left">
         <h1 class="mb-3">Build fast, responsive sites with Bootstrap</h1>