smol: Use `Unblock` instead of `Async` for stdin, stdout and stderr handles (#46141)
as per its documentation:
`Async` supports all networking types, as well as some OS-specific file
descriptors like timerfd and inotify.
However, do not use `Async` with types like File, Stdin, Stdout, or
Stderr because all operating systems have issues with them when put in
non-blocking mode.
Release Notes:
- N/A *or* Added/Fixed/Improved ...
797276bc73Lukas Wirth committed on 1/6/2026, 8:14:34 AM· committed by GitHubparentc7c0f56