JS: Add change note

Author: asger-semmle

change-notes/1.24/analysis-javascript.md

@@ -7,6 +7,8 @@
 * Imports with the `.js` extension can now be resolved to a TypeScript file,
   when the import refers to a file generated by TypeScript.
 
+- The analysis of sanitizer guards has improved, leading to fewer false-positive results from the security queries.
+
 * Support for the following frameworks and libraries has been improved:
   - [react](https://www.npmjs.com/package/react)
   - [typeahead.js](https://www.npmjs.com/package/typeahead.js)