Change setimmediatesorting demo title to match the tiles on EdgePortal site

setimmediatesorting/index.html

@@ -15,7 +15,7 @@
 		<header class="section section--page-intro demo__header">
 			<div class="container">
 				<div class="section__header">
-					<h1>Efficient Script Yielding</h1>
+					<h1>JavaScript Yielding</h1>
 				</div>
 			</div>
 		</header>