Bump pytz from 2022.7.1 to 2023.4 in /docker/taxii (#23965)

Bumps [pytz](https://github.com/stub42/pytz) from 2022.7.1 to 2023.4.
- [Commits](stub42/pytz@release_2022.7.1...release_2023.4)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>