doc: adjust wording in function.__closure__ clarification

Author: Vemulakonda559

Doc/reference/datamodel.rst

@@ -570,7 +570,7 @@ Special read-only attributes
        This can be used to get the value of the cell, as well as set the value.
 
        Only names that are actually referenced in the function body are
-       listed in :attr:`~codeobject.co_freevars` and therefore produce
+       listed in :attr:`~codeobject.co_freevars` and therefore have
        entries in ``function.__closure__``. Variables defined in an
        enclosing scope but never referenced inside the function do not
        appear in the closure.