style(sample): typo in HTML comment

Closes #1012

Author: nateabele

sample/index.html

@@ -58,7 +58,7 @@
       </div></div>
     </div>
 
-    <!-- Here is the main ui-view (unnamed) and will be populate by its immediate children's templates
+    <!-- Here is the main ui-view (unnamed) and will be populated by its immediate children's templates
          unless otherwise explicitly named views are targeted. It's also employing ng-animate. -->
     <div ui-view class="container slide" style="padding-top: 80px;"></div>