[3.14] Document that PyType_GetModule returns a borrowed ref (GH-145612)

(cherry picked from commit 4485545)

Co-authored-by: Petr Viktorin <encukou@gmail.com>

Author: encukou

Doc/c-api/type.rst

@@ -274,6 +274,10 @@ Type Objects
    Return the module object associated with the given type when the type was
    created using :c:func:`PyType_FromModuleAndSpec`.
 
+   The returned reference is :term:`borrowed <borrowed reference>` from *type*,
+   and will be valid as long as you hold a reference to *type*.
+   Do not release it with :c:func:`Py_DECREF` or similar.
+
    If no module is associated with the given type, sets :py:class:`TypeError`
    and returns ``NULL``.
 

Doc/data/refcounts.dat

@@ -2415,6 +2415,9 @@ PyType_GetFlags:PyTypeObject*:type:0:
 PyType_GetName:PyObject*::+1:
 PyType_GetName:PyTypeObject*:type:0:
 
+PyType_GetModule:PyObject*::0:
+PyType_GetModule:PyTypeObject*:type:0:
+
 PyType_GetModuleByDef:PyObject*::0:
 PyType_GetModuleByDef:PyTypeObject*:type:0:
 PyType_GetModuleByDef:PyModuleDef*:def::