change h1 to h2

h1 is smaller than h2 for some reason

index.html

@@ -42,7 +42,7 @@
   </div>
 <hr>
   <div class="row">
-    <h1 class="page-heading">Welcome to ROS Index</h1>
+    <h2>Welcome to ROS Index</h2>
     <p>
       ROS Index is the entry point for searching ROS and ROS 2 resources, including packages, repositories, system dependencies and documentation.
     </p>