include checksums optional argument in whats-new

Author: Mikejmnez

doc/whats-new.rst

@@ -17,7 +17,8 @@ New Features
   By `Matthew Willson <https://github.com/mjwillson>`_.
 - Added exception handling for invalid files in :py:func:`open_mfdataset`. (:issue:`6736`)
   By `Pratiman Patel <https://github.com/pratiman-91>`_.
-- Improved ``pydap`` backend behavior and performance when using :py:func:`open_dataset`, :py:func:`open_datatree` when downloading dap4 (opendap) data (:issue:`10628`, :pull:`10629`). ``batch=True|False`` is a new  ``backend_kwarg`` that further enables downloading multiple arrays in single response.
+- Improved ``pydap`` backend behavior and performance when using :py:func:`open_dataset`, :py:func:`open_datatree` when downloading dap4 (opendap) data (:issue:`10628`, :pull:`10629`).
+  ``batch=True|False`` is a new  ``backend_kwarg`` that further enables downloading multiple arrays in single response. In addition ``checksums`` is added as optional argument to be passed to ``pydap`` backend.
   By `Miguel Jimenez-Urias <https://github.com/Mikejmnez>`_.
 
 Breaking changes