DOC: Edit regression fix release note (#40019)

Author: dsaxton

doc/source/whatsnew/v1.2.3.rst

@@ -16,7 +16,7 @@ Fixed regressions
 ~~~~~~~~~~~~~~~~~
 
 - Fixed regression in :meth:`~DataFrame.to_excel` raising ``KeyError`` when giving duplicate columns with ``columns`` attribute (:issue:`39695`)
-- Fixed regression in :class:`IntegerArray` unary ops propagating mask on assignment (:issue:`39943`)
+- Fixed regression in nullable integer unary ops propagating mask on assignment (:issue:`39943`)
 - Fixed regression in :meth:`DataFrame.__setitem__` not aligning :class:`DataFrame` on right-hand side for boolean indexer (:issue:`39931`)
 
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