Alternate fix for #15250 with a more descriptive theme jumbotron

docs/examples/theme/index.html

@@ -69,9 +69,8 @@
 
       <!-- Main jumbotron for a primary marketing message or call to action -->
       <div class="jumbotron">
-        <h1>Hello, world!</h1>
-        <p>This is a template for a simple marketing or informational website. It includes a large callout called a jumbotron and three supporting pieces of content. Use it as a starting point to create something more unique.</p>
-        <p><a href="#" class="btn btn-primary btn-lg" role="button">Learn more &raquo;</a></p>
+        <h1>Theme example</h1>
+        <p>This is a template showcasing the optional theme stylesheet included in Bootstrap. Use it as a starting point to create something more unique by building on or modifying it.</p>
       </div>