try default

_config.yml

@@ -12,4 +12,5 @@ include:
   - CODE_OF_CONDUCT.md
   - CONTRIBUTING.md
   - ISSUE_TEMPLATE.md
-  - PULL_REQUEST_TEMPLATE.md
+  - PULL_REQUEST_TEMPLATE.md
+google_analytics: UA-229299773-1

_includes/analytics.html

@@ -1,9 +1,8 @@
-<!-- Global site tag (gtag.js) - Google Analytics -->
-<script async src="https://www.googletagmanager.com/gtag/js?id=G-E4LN4QRJK4"></script>
+<script async src="https://www.googletagmanager.com/gtag/js?id={{ site.google_analytics }}"></script>
 <script>
   window.dataLayer = window.dataLayer || [];
   function gtag(){dataLayer.push(arguments);}
   gtag('js', new Date());
 
-  gtag('config', 'G-E4LN4QRJK4');
+  gtag('config', '{{ site.google_analytics }}');
 </script>