Fix typo in whatsnew/3.6.rst

Doc/whatsnew/3.6.rst

@@ -560,7 +560,7 @@ Build and C API Changes
 * :c:func:`PyArg_ParseTupleAndKeywords` now supports :ref:`positional-only
   parameters <positional-only_parameter>`.  Positional-only parameters are
   defined by empty names.
-  (Contributed by Serhit Storchaka in :issue:`26282`).
+  (Contributed by Serhiy Storchaka in :issue:`26282`).
 
 
 Deprecated