Update whatsnew

doc/source/whatsnew/v1.5.3.rst

@@ -33,7 +33,6 @@ Bug fixes
 - Bug when chaining several :meth:`.Styler.concat` calls, only the last styler was concatenated (:issue:`49207`)
 - Fixed bug when instantiating a :class:`DataFrame` subclass inheriting from ``typing.Generic`` that triggered a ``UserWarning`` on python 3.11 (:issue:`49649`)
 - Bug in :func:`pandas.testing.assert_series_equal` (and equivalent ``assert_`` functions) when having nested data and using numpy >= 1.25 (:issue:`50360`)
-- Bug in :meth:`DataFrame.loc` leading to unwanted `FutureWarning` (:issue:`48673`)
 -
 
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@@ -49,6 +48,7 @@ Other
     as pandas works toward compatibility with SQLAlchemy 2.0.
 
 - Reverted deprecation (:issue:`45324`) of behavior of :meth:`Series.__getitem__` and :meth:`Series.__setitem__` slicing with an integer :class:`Index`; this will remain positional (:issue:`49612`)
+- A ``FutureWarning`` raised when attempting to set values inplace with `:meth:`DataFrame.loc` or `:meth:`DataFrame.loc`` has been changed to a ``DeprecationWarning`` (:issue:`48673`)
 -
 
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