address #10965; mention Glyphicons-over-file:// problem in Carousel example

examples/carousel/index.html

@@ -79,7 +79,7 @@
           <div class="container">
             <div class="carousel-caption">
               <h1>Example headline.</h1>
-              <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
+              <p>Note: If you're viewing this page via a <code>file://</code> URL, the "next" and "previous" Glyphicon buttons on the left and right might not load/display properly due to web browser security rules.</p>
               <p><a class="btn btn-lg btn-primary" href="#" role="button">Sign up today</a></p>
             </div>
           </div>