Update _layouts/article.html

change css class to h0-mktg for the page title

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

Author: Sophie Shepherd

_layouts/article.html

@@ -7,7 +7,7 @@
 <header class="article-header {{ page.class }} bg-gray-light">
   <div class="container-lg p-responsive clearfix mx-auto">
 
-    <h1 class="h1-mktg lh-condensed text-center mb-3">{{ page.title }}</h1>
+    <h1 class="h0-mktg lh-condensed text-center mb-3">{{ page.title }}</h1>
     <p class="lead text-center text-gray col-md-8 mx-auto mb-4 position-relative">{{ page.description }}</p>
     {% if page.lang == "en" %}
     <nav class="toc mb-4 mb-md-6">