moved to google analytics 4

Author: rhornig

_layouts/default.html

@@ -21,6 +21,16 @@
 	  ga('create', 'UA-240922-3', 'auto');
 	  ga('send', 'pageview');
 	</script>
+  <!-- Global site tag (gtag.js) - Google Analytics -->
+  <script async src="https://www.googletagmanager.com/gtag/js?id=G-WPFKHJQDQW"></script>
+  <script>
+    window.dataLayer = window.dataLayer || [];
+    function gtag(){dataLayer.push(arguments);}
+    gtag('js', new Date());
+
+    gtag('config', 'G-WPFKHJQDQW');
+  </script>
+
     {% if page.generateToC %}
     <script>
       var generateToC = function() {