Tooltip demo: Reword dialog description for clarity

Closes jquerygh-1233

Author: tjvantoll

demos/tooltip/custom-content.html

@@ -77,7 +77,7 @@ <h3><a href="http://maps.google.com/maps?q=london,+england&amp;z=11" data-geo>Lo
 
 <div class="demo-description">
 <p>Shows how to combine different event delegated tooltips into a single instance, by customizing the items and content options.</p>
-<p>Use dialog's for interactive content, like the maps.</p>
+<p>For interactive content, such as scrollable maps, use a dialog.</p>
 </div>
 </body>
 </html>