Bump certifi from 2021.10.8 to 2022.12.7 in /experiments/paper (#5)

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: direct:production
...

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experiments/paper/requirements_snapshot.txt

@@ -7,7 +7,7 @@ backcall==0.2.0
 backends==1.4.19
 backends-matrix==1.2.11
 black==22.3.0
-certifi==2021.10.8
+certifi==2022.12.7
 cftime==1.6.0
 charset-normalizer==2.0.12
 click==8.1.2