restored IS_WINDOWS to stub file

julianz- · julianz- · commit 506a4dff1328 · 2025-09-22T13:52:45.000-07:00
diff --git a/cheroot/connections.pyi b/cheroot/connections.pyi
@@ -1,5 +1,7 @@
 from typing import Any
 
+IS_WINDOWS: bool
+
 def prevent_socket_inheritance(sock) -> None: ...
 
 class _ThreadsafeSelector:
