update jupyterbookcoursetemplate plausible analytics file

_static/plausible_jupyterbookcoursetemplate.js

@@ -0,0 +1,13 @@
+// NOTE: This file allows my privacy-focused analytics provider (Plausible) to 
+// collect data on various aspects of usage.
+// Those that are using this repo as a template should REMOVE this file from their repo
+
+var script = document.createElement("script");
+script.defer = true;
+script.src = "https://plausible.io/js/script.js";
+script.dataset.domain = "jupyterbookcoursetemplate";
+
+// optional if using proxy
+// script.dataset.api = 'https://yourproxy.com/api/event';
+
+document.getElementsByTagName("head")[0].appendChild(script);