[Bug libstdc++/93542] std::future::wait_for should use monotonic clock

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93542

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks, Mike. I've added the PR number to the ChangeLog file in
g:b98d3cc5666f36bf3cbeed7cd6a23483cc5e4eca