gh-125674: Doc: Fix type of newfunc first parameter (GH-125675)

* gh-125674: Doc: Fix type of `newfunc` first parameter

* fixup! gh-125674: Doc: Fix type of `newfunc` first parameter

---------

Co-authored-by: Jelle Zijlstra <[email protected]>

Author: rhansen

Doc/c-api/typeobj.rst

@@ -355,7 +355,7 @@ slot typedefs
 +-----------------------------+-----------------------------+----------------------+
 | :c:type:`newfunc`           | .. line-block::             | :c:type:`PyObject` * |
 |                             |                             |                      |
-|                             |    :c:type:`PyObject` *     |                      |
+|                             |    :c:type:`PyTypeObject` * |                      |
 |                             |    :c:type:`PyObject` *     |                      |
 |                             |    :c:type:`PyObject` *     |                      |
 +-----------------------------+-----------------------------+----------------------+
@@ -2647,7 +2647,7 @@ Slot Type typedefs
 
    See :c:member:`~PyTypeObject.tp_free`.
 
-.. c:type:: PyObject *(*newfunc)(PyObject *, PyObject *, PyObject *)
+.. c:type:: PyObject *(*newfunc)(PyTypeObject *, PyObject *, PyObject *)
 
    See :c:member:`~PyTypeObject.tp_new`.