Update changelog

Kshitij68 · Kshitij68 · commit 7c8f1ef48f2a · 2022-09-12T05:20:09.000+05:30
diff --git a/doc/whats_new/v1.2.rst b/doc/whats_new/v1.2.rst
@@ -192,6 +192,11 @@ Changelog
   :pr:`11860` by :user:`Pierre Ablin <pierreablin>`,
   :pr:`22527` by :user:`Meekail Zain <micky774>` and `Thomas Fan`_.
 
+- |API| The `n_features_` attribute of
+  :class:`decomposition.PCA` is deprecated in favor of
+  `n_features_in_` and will be removed in 1.4. :pr:`20240` by
+  :user:`Kshitij Mathur <Kshitij68>`.
+
 :mod:`sklearn.discriminant_analysis`
 ....................................
 
@@ -305,7 +310,7 @@ Changelog
 - |Fix| Allows `csr_matrix` as input for parameter: `y_true` of
    the :func:`metrics.label_ranking_average_precision_score` metric.
    :pr:`23442` by :user:`Sean Atukorala <ShehanAT>`
-  
+
 - |Fix| :func:`metrics.ndcg_score` will now trigger a warning when the `y_true`
   value contains a negative value. Users may still use negative values, but the
   result may not be between 0 and 1. Starting in v1.4, passing in negative
