add comment to manifest reading function

src/index.html

@@ -47,6 +47,7 @@ <h2>Contribute</h2>
         </p>
       </section>
     <script>
+      // Render a list of components based on the content/criteria of the manifest.json file
       fetch('manifest.json')
         .then(response => response.json())
         .then(data => {