Fixed CDN links to Prettify

Author: Martijn van der Lee

index.html

@@ -13,8 +13,8 @@
 		<script src="https://cdnjs.cloudflare.com/ajax/libs/pagedown/1.0/Markdown.Converter.min.js"></script>
 
 		<!-- Prettyprint -->
-		<link href="https://google-code-prettify.googlecode.com/svn/loader/prettify.css" rel="stylesheet" type="text/css"/>
-		<script src="https://google-code-prettify.googlecode.com/svn/loader/prettify.js"></script>
+		<link href="https://cdnjs.cloudflare.com/ajax/libs/prettify/r298/prettify.min.css" rel="stylesheet" type="text/css"/>
+		<script src="https://cdnjs.cloudflare.com/ajax/libs/prettify/r298/prettify.min.js"></script>
 
 		<!-- Index -->
 		<style>