fix broken build

_config.yml

@@ -37,5 +37,5 @@ github: {
     "is_user_page": false,
     "is_project_page": true,
     "show_downloads": true,
-    "url": "http://mozilla.github.io/release-blog" // (or the CNAME)
+    "url": "http://mozilla.github.io/release-blog", // (or the CNAME)
 }