website: Update Google Analytics tag

Change-Id: I7bc0c4eb79df5fb10171595883c60274a4a7d57e
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-website/+/70478
Tested-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
diff --git a/_includes/head.html b/_includes/head.html
index 495697a..d537997 100755
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -1,13 +1,13 @@
 <head>
-	<!-- Global site tag (gtag.js) - Google Analytics -->
-	<script async src="https://www.googletagmanager.com/gtag/js?id='UA-133422980-2"></script>
-	<script>
-	  window.dataLayer = window.dataLayer || [];
-	  function gtag(){dataLayer.push(arguments);}
-	  gtag('js', new Date());
+	<!-- Google tag (gtag.js) -->
+    <script async src="https://www.googletagmanager.com/gtag/js?id=G-RHRDCWX0TS"></script>
+    <script>
+    window.dataLayer = window.dataLayer || [];
+    function gtag(){dataLayer.push(arguments);}
+    gtag('js', new Date());
 
-	  gtag('config', 'UA-133422980-2');
-	</script>
+    gtag('config', 'G-RHRDCWX0TS');
+    </script>
 
 	<meta charset="utf-8">
 	<meta http-equiv="x-ua-compatible" content="ie=edge">