[Bug libstdc++/116657] tzdata 2024b causing timezone parsing issues in std::chrono

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116657

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Arch's previous tzdata-2024a-2-x86_64.pkg.tar.zst did not use %z