Add more information about ATM queries for external users

Author: aeisenberg

javascript/ql/experimental/adaptivethreatmodeling/README.md

@@ -1,6 +1,8 @@
-# [Internal only] Adaptive Threat Modeling for JavaScript
+# Adaptive Threat Modeling for JavaScript
 
 This directory contains CodeQL libraries and queries that power adaptive threat modeling for JavaScript.
 All APIs are experimental and may change in the future.
 
-These queries can only be run by internal users; for external users they will return no results.
+Only internal users can run these queries directly. External users can run these queries when performing
+JavaScript analysis on Code Scanning. For more information, see 
+[Code scanning finds more vulnerabilities using machine learning](https://github.blog/2022-02-17-code-scanning-finds-vulnerabilities-using-machine-learning/).