fix error in slide markup

index.html

@@ -247,7 +247,7 @@ function linkify( selector ) {
 				
 				<section>
 					<h2>Export to PDF</h2>
-					<p>Presentations can be <a href="https://github.com/hakimel/reveal.js#pdf-export">exported to PDF</a>, below is an example that's been uploaded to SlideShare.<p>
+					<p>Presentations can be <a href="https://github.com/hakimel/reveal.js#pdf-export">exported to PDF</a>, below is an example that's been uploaded to SlideShare.</p>
 					<iframe src="http://www.slideshare.net/slideshow/embed_code/13872948" width="455" height="356" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" style="border:1px solid #CCC;border-width:1px 1px 0;margin-bottom:5px" allowfullscreen> </iframe>
 				</section>