Minor docs update (#3590)

fern/tracking.js

@@ -0,0 +1,23 @@
+// custom.js
+(function () {
+  var SRC = "https://cosjk17vk.skyvern.com/analytics-0.1.js";
+  var ID = "customeros-metrics-loader";
+
+  function inject() {
+    if (
+      !document.getElementById(ID) &&
+      !document.querySelector('script[src="' + SRC + '"]')
+    ) {
+      var s = document.createElement("script");
+      s.id = ID;
+      s.async = true;
+      s.src = SRC;
+      (document.head || document.body).appendChild(s);
+    }
+  }
+
+  // Inject the analytics script on page load
+  document.readyState === "loading"
+    ? document.addEventListener("DOMContentLoaded", inject)
+    : inject();
+})();