Help highlightjs with html examples

Author: swlkr

index.html

@@ -118,7 +118,7 @@ <h2 class="text-l mt-4 text-gray-700">Joy is a web framework written in
           </pre>
 
           <pre class="-mt-10">
-            <code class="rounded-lg">
+            <code class="html rounded-lg">
   &lt;h1 class="text-2xl text-gray-400"&gt;You found joy!&lt;/h1&gt;
             </code>
           </pre>
@@ -142,7 +142,7 @@ <h2 class="text-l mt-4 text-gray-700">Joy is a web framework written in
           </pre>
 
           <pre class="-mt-10">
-            <code class="rounded-lg">
+            <code class="html rounded-lg">
   &lt;h1 class="text-2xl text-gray-400"&gt;You found joy!&lt;/h1&gt;
             </code>
           </pre>