Update _layouts/index.html

change css class to h00-mktg

Co-Authored-By: damaneice <[email protected]>

Author: Sophie Shepherd

_layouts/index.html

@@ -8,7 +8,7 @@
 
   <header class="py-4 py-md-6">
     <div class="container-lg p-responsive mx-auto text-center pt-6">
-      <h1 class="h1-mktg">{{ site.title }}</h1>
+      <h1 class="h00-mktg">{{ site.title }}</h1>
       <p class="lead-mktg text-gray mb-md-5 col-md-8 mx-auto">
         {{ t.index.lead }}
       </p>