add change note

Author: erik-krogh

change-notes/1.26/analysis-javascript.md

@@ -26,6 +26,7 @@
 
 | **Query**                      | **Expected impact**          | **Change**                                                                |
 |--------------------------------|------------------------------|---------------------------------------------------------------------------|
+| Potentially unsafe external link (`js/unsafe-external-link`) | Fewer results | This query no longer flags URLs constructed using a template system where only the hash or query part of the URL is dynamic. |
 | Incomplete URL substring sanitization (`js/incomplete-url-substring-sanitization`) | More results | This query now recognizes additional URLs when the substring check is an inclusion check. |
 | Ambiguous HTML id attribute (`js/duplicate-html-id`) | Results no longer shown | Precision tag reduced to "low". The query is no longer run by default. |