Fix wrong availability for signal.SIGCHLD (#23285)

I believe this is a mistake. SIGCHLD is only available on Unix systems, not Windows.

diff --git a/Doc/library/signal.rst b/Doc/library/signal.rst
index 00a730b6b9ca6aee5d199d34970fd6d357d0af80..84a569d03eb29383b490af90e6352f30f72ee552 100644 (file)
--- a/Doc/library/signal.rst
+++ b/Doc/library/signal.rst
@@ -117,7 +117,7 @@ The variables defined in the :mod:`signal` module are:
 
    Child process stopped or terminated.
 
-   .. availability:: Windows.
+   .. availability:: Unix.
 
 .. data:: SIGCLD