build(deps): bump pytz from 2021.3 to 2022.1 in /tools

Bumps [pytz](https://github.com/stub42/pytz) from 2021.3 to 2022.1.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](stub42/pytz@release_2021.3...release_2022.1)

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

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

Author: dependabot[bot]

tools/requirements.txt

@@ -1,7 +1,7 @@
 aiohttp==3.7.4
 async-timeout==3.0.1
 logbook==1.5.3
-pytz==2021.3
+pytz==2022.1
 raven==6.10.0
 structlog==21.5.0
 taskcluster==44.4.0