Bump tzdata from 2025.3 to 2026.1 (#761)

Bumps [tzdata](https://github.com/python/tzdata) from 2025.3 to 2026.1.
- [Release notes](https://github.com/python/tzdata/releases)
- [Changelog](https://github.com/python/tzdata/blob/master/NEWS.md)
- [Commits](https://github.com/python/tzdata/compare/2025.3...2026.1)

---
updated-dependencies:
- dependency-name: tzdata
  dependency-version: '2026.1'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: besendorf <janik@besendorf.org>

pyproject.toml

@@ -35,7 +35,7 @@ dependencies = [
     "pydantic-settings==2.13.1",
     "NSKeyedUnArchiver==1.5.2",
     "python-dateutil==2.9.0.post0",
-    "tzdata==2025.3",
+    "tzdata==2026.1",
 ]
 requires-python = ">= 3.10"