Update tzdata requirement from ==2022.* to ==2023.*

Updates the requirements on [tzdata](https://github.com/python/tzdata) to permit the latest version.
- [Release notes](https://github.com/python/tzdata/releases)
- [Changelog](https://github.com/python/tzdata/blob/master/NEWS.md)
- [Commits](python/tzdata@2022.1...2023.3)

---
updated-dependencies:
- dependency-name: tzdata
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements/base.txt

@@ -5,4 +5,4 @@
 GitPython>=3.1,<3.2
 mkdocs>=1.1,<2
 pytz==2022.* ; python_version < "3.9"
-tzdata==2022.* ; python_version >= "3.9" and sys_platform == "win32"
+tzdata==2023.* ; python_version >= "3.9" and sys_platform == "win32"