luci-base: update timezone data to 2024a

Update timezone data to 2024a.

https://mm.icann.org/pipermail/tz-announce/2024-February/000081.html

Briefly:
* Kazakhstan unifies on UTC+5 beginning 2024-03-01.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>