Bump tzdata from 2023.3 to 2023.4

Bumps [tzdata](https://github.com/python/tzdata) from 2023.3 to 2023.4.
- [Release notes](https://github.com/python/tzdata/releases)
- [Changelog](https://github.com/python/tzdata/blob/master/NEWS.md)
- [Commits](python/tzdata@2023.3...2023.4)

---
updated-dependencies:
- dependency-name: tzdata
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -15,6 +15,6 @@ pytz==2023.3.post1
 PyYAML==6.0.1
 six==1.16.0
 sqlparse==0.4.4
-tzdata==2023.3
+tzdata==2023.4
 uritemplate==4.1.1
 uWSGI==2.0.23