DOC: whatsnew note for #57553 (#58075)

Author: jbrockmendel

doc/source/whatsnew/v2.2.2.rst

@@ -15,6 +15,7 @@ Fixed regressions
 ~~~~~~~~~~~~~~~~~
 - :meth:`DataFrame.__dataframe__` was producing incorrect data buffers when the a column's type was a pandas nullable on with missing values (:issue:`56702`)
 - :meth:`DataFrame.__dataframe__` was producing incorrect data buffers when the a column's type was a pyarrow nullable on with missing values (:issue:`57664`)
+- Avoid issuing a spurious ``DeprecationWarning`` when a custom :class:`DataFrame` or :class:`Series` subclass method is called (:issue:`57553`)
 - Fixed regression in precision of :func:`to_datetime` with string and ``unit`` input (:issue:`57051`)
 
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