Bump certifi from 2018.1.18 to 2022.12.7 in /ICLR2023

Bumps [certifi](https://github.com/certifi/python-certifi) from 2018.1.18 to 2022.12.7.
- [Release notes](https://github.com/certifi/python-certifi/releases)
- [Commits](certifi/python-certifi@2018.01.18...2022.12.07)

---
updated-dependencies:
- dependency-name: certifi
  dependency-type: direct:production
...

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

Author: dependabot[bot]

ICLR2023/requirements.txt

@@ -47,7 +47,7 @@ blis==0.7.4
 blobxfer==1.10.0
 cachetools==4.2.2
 catalogue==2.0.6
-certifi==2018.1.18
+certifi==2022.12.7
 cffi==1.14.6
 chardet==3.0.4
 charset-normalizer==2.0.7