Bump pytz from 2023.3.post1 to 2023.4 (#221)

Bumps [pytz](https://github.com/stub42/pytz) from 2023.3.post1 to 2023.4.
- [Commits](stub42/pytz@release_2023.3.post1...release_2023.4)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: konstantin <konstantin.klein@hochfrequenz.de>

dev_requirements/requirements-type_check.txt

@@ -30,7 +30,7 @@ pytest==7.4.4
     # via -r dev_requirements/requirements-type_check.in
 python-dateutil==2.8.2
     # via pandas
-pytz==2023.3.post1
+pytz==2023.4
     # via pandas
 six==1.16.0
     # via python-dateutil

requirements.txt

@@ -34,7 +34,7 @@ python-dateutil==2.8.2
     # via pandas
 python-docx==1.1.0
     # via -r requirements.in
-pytz==2023.3.post1
+pytz==2023.4
     # via pandas
 six==1.16.0
     # via python-dateutil