DOC Credit Thomas Fan for contribution to ColumnTransformer

Author: jnothman

doc/whats_new/v0.20.rst

@@ -109,7 +109,8 @@ Preprocessing
 
 - Added :class:`compose.ColumnTransformer`, which allows to apply
   different transformers to different columns of arrays or pandas
-  DataFrames. :issue:`9012` by `Andreas Müller`_ and `Joris Van den Bossche`_.
+  DataFrames. :issue:`9012` by `Andreas Müller`_ and `Joris Van den Bossche`_,
+  and :issue:`11315` by :user:`Thomas Fan <thomasjpfan>`_.
 
 - Added :class:`preprocessing.PowerTransformer`, which implements the Box-Cox
   power transformation, allowing users to map data from any distribution to a