DOC: Move whatsnew note for #58043 to v2.3.4 (#62811)

Author: rhshadrach

doc/source/whatsnew/index.rst

@@ -24,6 +24,7 @@ Version 2.3
 .. toctree::
    :maxdepth: 2
 
+   v2.3.4
    v2.3.3
    v2.3.2
    v2.3.1

doc/source/whatsnew/v2.3.4.rst

@@ -0,0 +1,21 @@
+.. _whatsnew_234:
+
+What's new in 2.3.4 (November XX, 2025)
+----------------------------------------
+
+These are the changes in pandas 2.3.4. See :ref:`release` for a full changelog
+including other versions of pandas.
+
+{{ header }}
+
+.. ---------------------------------------------------------------------------
+
+Bug fixes
+^^^^^^^^^
+- Bug in :meth:`DataFrame.__getitem__` returning modified columns when called with ``slice`` in Python 3.12 (:issue:`57500`)
+
+.. ---------------------------------------------------------------------------
+.. _whatsnew_234.contributors:
+
+Contributors
+~~~~~~~~~~~~

doc/source/whatsnew/v3.0.0.rst

@@ -1132,7 +1132,6 @@ Interval
 
 Indexing
 ^^^^^^^^
-- Bug in :meth:`DataFrame.__getitem__` returning modified columns when called with ``slice`` in Python 3.12 (:issue:`57500`)
 - Bug in :meth:`DataFrame.__getitem__` when slicing a :class:`DataFrame` with many rows raised an ``OverflowError`` (:issue:`59531`)
 - Bug in :meth:`DataFrame.__setitem__` on an empty :class:`DataFrame` with a tuple corrupting the frame (:issue:`54385`)
 - Bug in :meth:`DataFrame.from_records` throwing a ``ValueError`` when passed an empty list in ``index`` (:issue:`58594`)