JS: Change note

javascript/ql/src/change-notes/2025-02-28-membership-regexp-test.md

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+---
+category: fix
+---
+* Fixed a bug that would in rare cases cause some regexp-based checks
+  to seen as generic taint sanitisers, even though the underlying regexp
+  is not restrictive enough. The regexps are now analysed more precisely,
+  and unrestrictive regexp checks will no longer block taint flow.