bpo-46383: Fix signature of zoneinfo module_free function (GH-30607) (GH-30610)

(cherry picked from commit cfbde65df3)

Co-authored-by: Christian Heimes <christian@python.org>

Co-authored-by: Christian Heimes <christian@python.org>

Misc/NEWS.d/next/Core and Builtins/2022-01-14-20-55-34.bpo-46383.v8MTl4.rst

@@ -0,0 +1,2 @@
+Fix invalid signature of ``_zoneinfo``'s ``module_free`` function to resolve
+a crash on wasm32-emscripten platform.

Modules/_zoneinfo.c

@@ -2608,7 +2608,7 @@ static PyTypeObject PyZoneInfo_ZoneInfoType = {
 // Specify the _zoneinfo module
 static PyMethodDef module_methods[] = {{NULL, NULL}};
 static void
-module_free(void)
+module_free(void *m)
 {
     Py_XDECREF(_tzpath_find_tzfile);
     _tzpath_find_tzfile = NULL;