Updated timezone data to 2026.1 release.
Full release notes:
https://github.com/stub42/pytz/blob/master/src/CHANGES.rst
pytz 2026.1 requires setuptools as build backend but it was not
declared as a build dependency, causing the build to fail with
'setuptools.build_meta:__legacy__ is not available'.
Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>
