fix the warning :

btuduri · btuduri · commit 209d529df30a · 2014-07-17T21:41:05.000+02:00
Deprecation: The 'pygments' configuration option has been renamed to 'highlighter'. Please update your config file accordingly. The allowed values are 'rouge', 'pygments' or null.
diff --git a/_config.yml b/_config.yml
@@ -13,7 +13,7 @@ keywords:
 
 scala-version: 2.10.0
 
-pygments: true
+highlighter: pygments
 permalink: /:categories/:title.html
 
-# markdown: rdiscount
+# markdown: rdiscount
