Easing: Fixed small typo in easing demo

(cherry picked from commit fe75984)

Author: agcolom

demos/effect/easing.html

@@ -96,7 +96,7 @@
 <div id="graphs"></div>
 
 <div class="demo-description">
-<p><strong>All easings provided by jQuery UI are drawn above, using a HTML canvas element</strong>. Click a diagram to see the easing in action.</p>
+<p><strong>All easings provided by jQuery UI are drawn above, using an HTML canvas element</strong>. Click a diagram to see the easing in action.</p>
 </div>
 </body>
 </html>