Update doc/source/whatsnew/v2.1.0.rst

Co-authored-by: Matthew Roeschke <[email protected]>

Author: ssche

doc/source/whatsnew/v2.1.0.rst

@@ -422,7 +422,7 @@ Indexing
 ^^^^^^^^
 - Bug in :meth:`DataFrame.__setitem__` losing dtype when setting a :class:`DataFrame` into duplicated columns (:issue:`53143`)
 - Bug in :meth:`DataFrame.__setitem__` with a boolean mask and :meth:`DataFrame.putmask` with mixed non-numeric dtypes and a value other than ``NaN`` incorrectly raising ``TypeError`` (:issue:`53291`)
-- Bug when using ``nan`` to index (:issue:`52234`)
+- Bug in :meth:`DataFrame.iloc` when using ``nan`` as the only element (:issue:`52234`)
 
 Missing
 ^^^^^^^