Bump certifi from 2022.5.18.1 to 2022.6.15

Bumps [certifi](https://github.com/certifi/python-certifi) from 2022.5.18.1 to 2022.6.15.
- [Release notes](https://github.com/certifi/python-certifi/releases)
- [Commits](certifi/python-certifi@2022.05.18.1...2022.06.15)

---
updated-dependencies:
- dependency-name: certifi
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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

docs-requirements.txt

@@ -8,7 +8,7 @@ alabaster==0.7.12
     # via sphinx
 babel==2.10.2
     # via sphinx
-certifi==2022.5.18.1
+certifi==2022.6.15
     # via requests
 cffi==1.15.0
     # via cryptography