build(deps): 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: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements-pinned.txt

@@ -1,4 +1,4 @@
-certifi==2022.5.18.1        # via requests
+certifi==2022.6.15        # via requests
 cffi==1.15.0              # via cryptography, pynacl
 charset-normalizer==2.0.12 # via requests
 cryptography==37.0.2      # via securesystemslib