Update Doc/whatsnew/3.3.rst from :data: to :const: as suggested

Author: abkmystery

Doc/whatsnew/3.3.rst

@@ -1147,8 +1147,8 @@ API changes
    | :const:`MIN_EMIN` | ``-425000000`` | ``-999999999999999999`` |
    +-------------------+----------------+-------------------------+
 
-* In the context templates (:data:`~decimal.DefaultContext`,
-  :data:`~decimal.BasicContext` and :data:`~decimal.ExtendedContext`)
+* In the context templates (:const:`~decimal.DefaultContext`,
+  :const:`~decimal.BasicContext` and :const:`~decimal.ExtendedContext`)
   the magnitude of :attr:`~decimal.Context.Emax` and
   :attr:`~decimal.Context.Emin` has changed to ``999999``.