Change analytics script from Panelbear to Cronitor (#1561)

Panelbear is now Cronitor RUM, the old script does not work.

_config.yml

@@ -113,7 +113,7 @@ contact_note: >
 # -----------------------------------------------------------------------------
 
 google_analytics:  # your Google Analytics measurement ID (format: G-XXXXXXXXXX)
-panelbear_analytics:  # panelbear analytics site ID (format: XXXXXXXXX)
+cronitor_analytics:  # cronitor RUM analytics site ID (format: XXXXXXXXX)
 
 google_site_verification:  # your google-site-verification ID (Google Search Console)
 bing_site_verification:  # out your bing-site-verification ID (Bing Webmaster)
@@ -356,7 +356,7 @@ jekyll-diagrams:
 # -----------------------------------------------------------------------------
 
 enable_google_analytics:    false  # enables google analytics
-enable_panelbear_analytics: false  # enables panelbear analytics
+enable_cronitor_analytics: false  # enables cronitor RUM analytics
 enable_google_verification: false  # enables google site verification
 enable_bing_verification:   false  # enables bing site verification
 enable_masonry:             true   # enables automatic project cards arrangement

_includes/scripts/analytics.html

@@ -8,11 +8,11 @@
     gtag('config', '{{ site.google_analytics }}');
   </script>
 {%- endif -%}
-{%- if site.enable_panelbear_analytics -%}
-  <!-- Panelbear Analytics - We respect your privacy -->
-  <script async src="https://cdn.panelbear.com/analytics.js?site={{site.panelbear_analytics}}"></script>
+{%- if site.enable_cronitor_analytics -%}
+  <!-- Cronitor RUM -->
+  <script async src="https://rum.cronitor.io/script.js"></script>
   <script>
-    window.panelbear = window.panelbear || function() { (window.panelbear.q = window.panelbear.q || []).push(arguments); };
-    panelbear('config', { site: '{{site.panelbear_analytics}}' });
+    window.cronitor = window.cronitor || function() { (window.cronitor.q = window.cronitor.q || []).push(arguments); };
+    cronitor('config', { clientKey: '{{site.cronitor_analytics}}' });
   </script>
 {%- endif -%}