Update GTag (#91)

Author: arcivanov

_includes/layout/metaAndStyles.html

@@ -1,10 +1,10 @@
-<script async src="https://www.googletagmanager.com/gtag/js?id=UA-2839506-6"></script>
+<script async src="https://www.googletagmanager.com/gtag/js?id=G-C74FKNHM7K"></script>
 <script>
   window.dataLayer = window.dataLayer || [];
   function gtag(){dataLayer.push(arguments);}
   gtag('js', new Date());
 
-  gtag('config', 'UA-2839506-6');
+  gtag('config', 'G-C74FKNHM7K');
 </script>
 
 <meta charset="utf-8">