chore(deps): bump pytz from 2023.3.post1 to 2023.4 (#19)

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>

requirements.txt

@@ -2,6 +2,6 @@ Django==4.1.13
 gunicorn==21.2.0
 mysqlclient==2.2.1
 oauthlib==3.2.2
-pytz==2023.3.post1
+pytz==2023.4
 requests==2.31.0
 requests-oauthlib==1.3.1