docs: Add footer link to Mithril Protocol Insights dashboard

Author: jpraynaud

docs/website/docusaurus.config.js

@@ -191,6 +191,10 @@ const config = {
                 label: 'Mithril Networks Status',
                 href: 'https://mithril.cronitorstatus.com/'
               },
+              {
+                label: 'Mithril Protocol Insights',
+                href: 'https://lookerstudio.google.com/s/oi6CR5eZrnQ'
+              },
               {
                 label: 'Logbook',
                 href: 'https://github.com/input-output-hk/mithril/wiki/Logbook'