fix whatsnew

This is temporary as which module should the function be put is not determined yet in the discourse discussion.

Author: tanloong

Doc/whatsnew/3.15.rst

@@ -1064,8 +1064,7 @@ types
   This represents the type of the :attr:`frame.f_locals` attribute,
   as described in :pep:`667`.
 
-* Expose ``_PyObject_LookupSpecialMethod`` as
-  :func:`types.lookup_special_method`.
+* Expose ``_PyObject_LookupSpecial`` as :func:`types.lookup_special`.
 
 unicodedata
 -----------