[3.13] gh-122153: indicate that Windows does not support `socket.{send,recv}_fds` (GH-134960) (#135017)

This amends commit e3b6ff19aaa318a813130ba9ad2ab0a332f27feb.
(cherry picked from commit 128195e12eb6d5b9542558453df7045dd7aa1e15)

Co-authored-by: GalaxySnail <me@glxys.nl>