build(deps): bump pytz from 2025.2 to 2026.1.post1

Bumps [pytz](https://github.com/stub42/pytz) from 2025.2 to 2026.1.post1.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](stub42/pytz@release_2025.2...release_2026.1.post1)

---
updated-dependencies:
- dependency-name: pytz
  dependency-version: 2026.1.post1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -12,7 +12,7 @@ pydantic==2.12.5
     # via fundamend (pyproject.toml)
 pydantic-core==2.41.5
     # via pydantic
-pytz==2025.2
+pytz==2026.1.post1
     # via efoli
 typing-extensions==4.15.0
     # via