DOC: sphinx error in 1.2.1 release notes (#38850)

Author: simonjayhawkins

doc/source/whatsnew/v1.2.1.rst

@@ -21,8 +21,8 @@ Fixed regressions
 - Fixed regression in :meth:`DataFrame.groupby()` with :class:`Categorical` grouping column not showing unused categories for ``grouped.indices`` (:issue:`38642`)
 - Fixed regression in :meth:`DataFrame.any` and :meth:`DataFrame.all` not returning a result for tz-aware ``datetime64`` columns (:issue:`38723`)
 - Fixed regression in :meth:`.GroupBy.sem` where the presence of non-numeric columns would cause an error instead of being dropped (:issue:`38774`)
-- :func:`read_excel` does not work for non-rawbyte file handles (issue:`38788`)
-- Bug in :meth:`read_csv` with ``float_precision="high"`` caused segfault or wrong parsing of long exponent strings (:issue:`38753`)
+- Fixed regression in :func:`read_excel` with non-rawbyte file handles (:issue:`38788`)
+- Bug in :meth:`read_csv` with ``float_precision="high"`` caused segfault or wrong parsing of long exponent strings. This resulted in a regression in some cases as the default for ``float_precision`` was changed in pandas 1.2.0 (:issue:`38753`)
 -
 
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