DOC update whats_new with LDA n_topics deprecation
@@ -346,6 +346,10 @@ API changes summary
the weighted impurity decrease from splitting is no longer alteast
``min_impurity_decrease``. :issue:`8449` by `Raghav RV_`
+ - The ``n_topics`` parameter of :class:`decomposition.LatentDirichletAllocation`
+ has been renamed to ``n_components`` and will be removed in version 0.21.
+ :issue:`8922` by :user:Attractadore
+
.. _changes_0_18_1:
