build(deps): bump pytz from 2022.6 to 2022.7.1 in /tools (#1712)

Bumps [pytz](https://github.com/stub42/pytz) from 2022.6 to 2022.7.1.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](stub42/pytz@release_2022.6...release_2022.7.1)

---
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>

Author: dependabot[bot]

tools/requirements.txt

@@ -1,7 +1,7 @@
 aiohttp==3.8.3
 async-timeout==4.0.2
 logbook==1.5.3
-pytz==2022.6
+pytz==2022.7.1
 raven==6.10.0
 structlog==22.3.0
 taskcluster==47.1.2