Update pytz requirement from ~=2022.2 to ~=2022.7 (#124)

Updates the requirements on [pytz](https://github.com/stub42/pytz) to permit the latest version.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](stub42/pytz@release_2022.2...release_2022.7)

---
updated-dependencies:
- dependency-name: pytz
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -2,5 +2,5 @@ related~=0.7.3
 aenum~=3.1.11
 aiohttp~=3.8.4
 yarl~=1.8.1
-pytz~=2022.2
+pytz~=2022.7
 uonet-request-signer-hebe==0.1.1