Change title from '2048 Game' to to '2048'

index.html

@@ -17,8 +17,8 @@
 
   <meta name="apple-itunes-app" content="app-id=868076805">
 
-  <meta property="og:title" content="2048 game"/>
-  <meta property="og:site_name" content="2048 game"/>
+  <meta property="og:title" content="2048"/>
+  <meta property="og:site_name" content="2048"/>
   <meta property="og:description" content="Join the numbers and get to the 2048 tile! Careful: this game is extremely addictive!"/>
   <meta property="og:image" content="http://gabrielecirulli.github.io/2048/meta/og_image.png"/>