Also drop the fuzzy marker from the Korean catalog header. Babel skips a
catalog whose header is fuzzy, and ko's header still carried the
unfilled template placeholders that make babel mark it so, with the
result that ko/LC_MESSAGES/messages.mo had not been regenerated since
November 2025 -- 83KB against the 263KB the .po compiles to, so most of
the 89% of Korean strings that are translated never reached users.