chore(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

@@ -9,7 +9,7 @@ pyIsEmail==2.0.1
 GitPython==3.1.46
 xmltodict==1.0.4
 lxml==6.0.2
-pytz==2025.2
+pytz==2026.1.post1
 tzlocal==5.3.1
 markdown2==2.5.5
 flask-migrate==4.1.0