update

Author: kyu08

layouts/partials/extended_head.html

@@ -1,6 +1,6 @@
 <link rel="author" href="http://www.hatena.ne.jp/kyu08/" />
 
-{{ if not .Site.IsServer }}
+{{ if not hugo.IsServer }}
 {{ with .Site.GoogleAnalytics }}
 <!-- Google tag (gtag.js) -->
 <script async src="https://www.googletagmanager.com/gtag/js?id={{ . }}"></script>