fix(icon):typo

content/_meta.md

@@ -11,11 +11,12 @@ social:
     - title: Help us by creating/collecting bounties and pledging to fundraisers
       url: https://www.bountysource.com/teams/picocms
       icon: dollar
-icon0: moon-upload
+icon0: github
 icon0_txt: Our Git repo
-icon1: moon-upload
+icon1: upload
+icon2: printer
 button:
-    - icon: moon-upload
+    - icon: upload
 image1: 
     url: '%theme_url%/img/drop.jpg'
     alt: Image alternative