clarify links to FF bugs

CHANGELOG.md

@@ -1,7 +1,7 @@
 ## Changelog
 ##### Unreleased
 - Added a workaround of the Bun ~ 0.1.1 [bug](https://github.com/Jarred-Sumner/bun/issues/399) that define some globals with incorrect property descriptors
-- Added a fix of the FF103 `structuredClone` [bug](https://bugzilla.mozilla.org/show_bug.cgi?id=1778762) that now can clone errors, but `.stack` of the clone is an empty string
+- Added a fix of the FF103+ `structuredClone` bugs ([1774866](https://bugzilla.mozilla.org/show_bug.cgi?id=1774866) (fixed in FF104) and [1777321](https://bugzilla.mozilla.org/show_bug.cgi?id=1777321) (still not fixed)) that now can clone errors, but `.stack` of the clone is an empty string
 - Fixed order of errors throwing on iterator helpers
 
 ##### [3.23.3 - 2022.06.26](https://github.com/zloirock/core-js/releases/tag/v3.23.3)