Update whats-new.rst

Author: pnijhara

doc/whats-new.rst

@@ -129,6 +129,10 @@ Internal Changes
 - Use ``async`` / ``await`` for the asynchronous distributed
   tests. (:issue:`3987`, :pull:`3989`)
   By `Justus Magin <https://github.com/keewis>`_.
+- Remove unnecessary comprehensions becuase the built-in functions like
+  ``all``, ``any``, ``enumerate``, ``sum``, ``tuple`` etc. can work directly with a
+  generator expression. (:pull:`4026`)
+  By `Prajjwal Nijhara <https://github.com/pnijhara>`_.
 
 .. _whats-new.0.15.1: