Bump certifi from 2020.12.5 to 2022.12.7 in /requirements

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:development
...

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

Author: dependabot[bot]

requirements/dev.txt

@@ -3,7 +3,7 @@ alabaster==0.7.12
 appdirs==1.4.4
 attrs==21.2.0
 babel==2.9.1
-certifi==2020.12.5
+certifi==2022.12.7
 cfgv==3.3.0
 chardet==4.0.0
 distlib==0.3.1