DOC: doc fix (pandas-dev#36205)

Author: simonjayhawkins

doc/source/whatsnew/v1.1.2.rst

@@ -51,7 +51,7 @@ Bug fixes
 Other
 ~~~~~
 - :meth:`factorize` now supports ``na_sentinel=None`` to include NaN in the uniques of the values and remove ``dropna`` keyword which was unintentionally exposed to public facing API in 1.1 version from :meth:`factorize` (:issue:`35667`)
-- :meth:`DataFrame.plot` and meth:`Series.plot` raise ``UserWarning`` about usage of FixedFormatter and FixedLocator (:issue:`35684` and :issue:`35945`)
+- :meth:`DataFrame.plot` and :meth:`Series.plot` raise ``UserWarning`` about usage of ``FixedFormatter`` and ``FixedLocator`` (:issue:`35684` and :issue:`35945`)
 
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