Fix scalaio image link

well it looks like the original PR was made on a bad day, the image link was incorrect too :(

Author: jeantil

events/_posts/2016-10-27-scalaio.md

@@ -1,7 +1,7 @@
 ---
 category: event
 title: Scala.IO 2016
-logo: /resources/img/scala-io.png
+logo: /resources/img/scalaio.png
 location: Lyon, France
 description: Beginner to advanced user  Scala and FP conference in France
 start: 27 October 2016