Modal docs have a slight error

Created by: pjrobertson

If you look at the code for the first Model 'Live Demo' here you'll see that the modal title code is shown as:

<h4 class="modal-title" id="myModalLabel">Modal title</h4>

If you open the live demo (click the 'Launch Demo Modal' button), the actual title is 'Modal Heading' (as the actual code is

<h4 class="modal-title" id="myModalLabel">Modal Heading</h4>