Update javascript.html

Fixed issue in Tabs example where the div had been marked as 'active' but the li had not been.  The correct tab of data would be displayed on load, but no tabs would be highlighted.  The tabs with fade example does not have this issue.  jsFiddle: http://jsfiddle.net/uXV56/

docs/javascript.html

@@ -793,7 +793,7 @@ $('#myTab li:eq(2) a').tab('show') // Select third tab (0-indexed)
 {% highlight html %}
 <!-- Nav tabs -->
 <ul class="nav nav-tabs">
-  <li><a href="#home" data-toggle="tab">Home</a></li>
+  <li class="active"><a href="#home" data-toggle="tab">Home</a></li>
   <li><a href="#profile" data-toggle="tab">Profile</a></li>
   <li><a href="#messages" data-toggle="tab">Messages</a></li>
   <li><a href="#settings" data-toggle="tab">Settings</a></li>