[Bug libstdc++/121237] Wrong return value of `condition_variable_any::wait_until`

[rohan at rohanlean dot de via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121237

--- Comment #1 from Rohan Lean <rohan at rohanlean dot de> ---
I copy pasted the wrong listing from the standard by mistake.  The correct one
is:

```
while (!stoken.stop_requested()) {
   if (pred())
      return true;
   if (wait_until(lock, abs_time) == cv_status::timeout)
      return pred();
}
return pred();
```