Add UMAMI page analytics

Author: Robadob

config.yaml

@@ -94,3 +94,6 @@ profiles:
 # These config items are used to deploy the University of Sheffield varnish theme
 #varnish: RSE-Sheffield/uos-varnish@main
 #url: 'https://rse.shef.ac.uk/pando-python'
+
+analytics: |
+  <script defer src="https://cloud.umami.is/script.js" data-website-id="2b561bd0-0d7a-436b-a18d-d19c94785362"></script>