Add link to ticket which introduced Espree

Author: westonruter

src/js/_enqueues/deprecated/fakejshint.js

@@ -7,6 +7,7 @@
  * @deprecated 7.0.0
  * @output wp-includes/js/codemirror/fakejshint.js
  * @see https://core.trac.wordpress.org/ticket/42850
+ * @see https://core.trac.wordpress.org/ticket/64558
  */
 
 /* jshint -W057 */