build(deps): bump pytz from 2023.2 to 2023.3

Bumps [pytz](https://github.com/stub42/pytz) from 2023.2 to 2023.3.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](https://github.com/stub42/pytz/compare/release_2023.2...release_2023.3)

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

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

requirements.txt

@@ -65,7 +65,7 @@ pyparsing==3.0.9
 pyrsistent==0.19.3
 python-dateutil==2.8.2
 python-tumblpy==1.1.4
-pytz==2023.2
+pytz==2023.3
 PyYAML==6.0
 redis==4.5.3
 requests==2.28.2