Bump pytz from 2022.1 to 2022.2.1

Bumps [pytz](https://github.com/stub42/pytz) from 2022.1 to 2022.2.1.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](stub42/pytz@release_2022.1...release_2022.2.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements/production.txt

@@ -16,6 +16,6 @@ pinax-eventlog==5.1.1
 pip==22.2.2
 -e git+https://github.com/pretalx/pretalx@27aafeba79e9f33fc07e148b141773180e938883#egg=pretalx[redis]&subdirectory=src
 psycopg2==2.9.3
-pytz==2022.1
+pytz==2022.2.1
 sentry-sdk==1.9.9
 virtualenv==20.16.5