Improve descriptive text

Author: Mark Gibbs

demo/demo/templates/demo_five.html

@@ -13,7 +13,7 @@ <h1>Direct App Embedding</h1>
 <p>
   The plotly_class tag is also used to wrap the application in css class names based on the
   application (django-plotly-dash), the
-  type of the embedding (iframe), and the slugified version of the app name (simpleexample).
+  type of the embedding (here labelled "div-direct"), and the slugified version of the app name (simpleexample).
 </p>
 <div class="card bg-light border-dark">
   <div class="card-body">