build(deps): bump pytz from 2022.6 to 2022.7

Bumps [pytz](https://github.com/stub42/pytz) from 2022.6 to 2022.7.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](https://github.com/stub42/pytz/compare/release_2022.6...release_2022.7)

---
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

@@ -59,7 +59,7 @@ pymemcache==4.0.0
 pyparsing==3.0.9
 python-dateutil==2.8.2
 python-tumblpy==1.1.4
-pytz==2022.6
+pytz==2022.7
 PyYAML==6.0
 redis==4.4.0
 requests==2.28.1