Fix whatsnew entry

Author: roberthdevries

doc/source/whatsnew/v1.1.0.rst

@@ -289,7 +289,8 @@ Other enhancements
 - Make :class:`pandas.core.window.Rolling` and :class:`pandas.core.window.Expanding` iterable（:issue:`11704`)
 - Make ``option_context`` a :class:`contextlib.ContextDecorator`, which allows it to be used as a decorator over an entire function (:issue:`34253`).
 - :meth:`to_csv` now accepts an ``error`` argument (:issue:`22610`)
--
+- :meth:`DataFrame.to_csv` and :meth:`Series.to_csv` now accept an ``error`` argument (:issue:`22610`)
+
 
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