Google Analytics script is out of date

[jacobwoffenden]

The script here https://github.com/alphagov/tech-docs-gem/blob/main/lib/source/layouts/_analytics.erb#L1-L15 is out of data I think, it needs to be

<!-- Google tag (gtag.js) -->
<script async src="https://www.googletagmanager.com/gtag/js?id=<%= config[:tech_docs][:ga_tracking_id] %>"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', '<%= config[:tech_docs][:ga_tracking_id] %>');
</script>

[jacobwoffenden]

Open pull request for this already #350