Bump certifi from 2018.11.29 to 2022.12.7

Bumps [certifi](https://github.com/certifi/python-certifi) from 2018.11.29 to 2022.12.7.
- [Release notes](https://github.com/certifi/python-certifi/releases)
- [Commits](https://github.com/certifi/python-certifi/compare/2018.11.29...2022.12.07)

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

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

requirements.txt

@@ -18,7 +18,7 @@ bcrypt==3.1.6
 billiard==3.5.0.5
 cachetools==3.1.1
 celery==4.1.1
-certifi==2018.11.29
+certifi==2022.12.7
 cffi==1.12.3
 channels==2.2.0
 channels-redis==2.4.0