Update example debugbar

Author: barryvdh

docs/assets/preview.png

@@ -43,7 +43,7 @@ <h1>{{ config.site_description }}</h1>
             </p>
 
             <div class="mdx-hero__image">
-                <img src="assets/preview.png" alt="" width="1293" height="267" draggable="false">
+                <img src="assets/preview.png" alt="" width="1133" height="287" draggable="false">
             </div>
             <div class="mdx-hero__content">