Bump certifi from 2020.12.5 to 2022.12.7

Bumps [certifi](https://github.com/certifi/python-certifi) from 2020.12.5 to 2022.12.7.
- [Release notes](https://github.com/certifi/python-certifi/releases)
- [Commits](certifi/python-certifi@2020.12.05...2022.12.07)

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

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

requirements.txt

@@ -15,7 +15,7 @@ attrs==20.3.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2,
 autobahn==21.2.1; python_version >= '3.6'
 automat==20.2.0
 blessed==1.17.12
-certifi==2020.12.5
+certifi==2022.12.7
 cffi==1.14.5
 channels-redis==3.2.0
 channels==3.0.3