contrib/tzdata: import tzdata 2023d
Changes: https://github.com/eggert/tz/blob/2023d/NEWS
Approved by: so
Security: FreeBSD-EN-24:01.tzdata
(cherry picked from commit eebb9c2caea1584773ae4cec311cee1eea5b1655)
(cherry picked from commit b277fb9996b1c52235647442f88de7403782c6ac)