Bump certifi from 2021.10.8 to 2022.12.7 in /llvm/utils/git

Bumps [certifi](https://github.com/certifi/python-certifi) from 2021.10.8 to 2022.12.7.
- [Release notes](https://github.com/certifi/python-certifi/releases)
- [Commits](certifi/python-certifi@2021.10.08...2022.12.07)

---
updated-dependencies:
- dependency-name: certifi
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

llvm/utils/git/requirements.txt

@@ -4,7 +4,7 @@
 #
 #    pip-compile --output-file=requirements.txt requirements.txt.in
 #
-certifi==2021.10.8
+certifi==2022.12.7
     # via requests
 cffi==1.15.0
     # via pynacl