small copy update

Author: lmammino

src/index.html.njk

@@ -68,7 +68,7 @@ og_type:
         <div class="columns is-centered">
           <div class="column is-half"></div>
           <div class="column is-half">
-            <h2 class="title is-2">Looking for a reliable source to learn how to create extensible modern web applications?</h2>
+            <h2 class="title is-2">Building modern extensible web applications is hard!</h2>
           </div>
         </div>
         <div class="columns is-centered">