Update v0.20.0.txt

Author: ashishsingal1

doc/source/whatsnew/v0.20.0.txt

@@ -105,6 +105,7 @@ Other enhancements
   of sorting or an incorrect key. See :ref:`here <advanced.unsorted>`
 
 - ``pd.cut`` and ``pd.qcut`` now support datetime64 and timedelta64 dtypes (:issue:`14714`, :issue:`14798`)
+- ``pd.qcut`` can optionally remove duplicate edges instead of throwing an error (:issue:`7751`)
 - ``Series`` provides a ``to_excel`` method to output Excel files (:issue:`8825`)
 - The ``usecols`` argument in ``pd.read_csv`` now accepts a callable function as a value  (:issue:`14154`)
 - ``pd.DataFrame.plot`` now prints a title above each subplot if ``suplots=True`` and ``title`` is a list of strings (:issue:`14753`)