Fix syntax of IE 8 comment in example, which was being rendered on the page in some versions of FF for Mac OS X

Author: suzannehamilton

example/index.html

@@ -15,7 +15,7 @@
     <link href="../introjs.css" rel="stylesheet">
     <!--[if lte IE 8]>
     <link href="../introjs-ie.css" rel="stylesheet">
-    <!-- <![endif]-->
+    <![endif]-->
 
     <link href="css/bootstrap-responsive.min.css" rel="stylesheet">
   </head>

example/index_programmatic.html

@@ -15,7 +15,7 @@
     <link href="../introjs.css" rel="stylesheet">
     <!--[if lte IE 8]>
     <link href="../introjs-ie.css" rel="stylesheet">
-    <!-- <![endif]-->
+    <![endif]-->
 
     <link href="css/bootstrap-responsive.min.css" rel="stylesheet">
   </head>