gh-136549: Fix signature of threading.excepthook()

Author: serhiy-storchaka

Misc/NEWS.d/next/Library/2025-07-11-23-04-39.gh-issue-136549.oAi8u4.rst

@@ -0,0 +1 @@
+Fix signature of :func:`threading.excepthook`.

Modules/_threadmodule.c

@@ -2330,7 +2330,7 @@ thread_excepthook(PyObject *module, PyObject *args)
 }
 
 PyDoc_STRVAR(excepthook_doc,
-"_excepthook($module, (exc_type, exc_value, exc_traceback, thread), /)\n\
+"_excepthook($module, args, /)\n\
 --\n\
 \n\
 Handle uncaught Thread.run() exception.");