Bump certifi in /search-website-functions-v4/bulk-upload

Bumps [certifi](https://github.com/certifi/python-certifi) from 2020.12.5 to 2022.12.7.
- [Release notes](https://github.com/certifi/python-certifi/releases)
- [Commits](certifi/python-certifi@2020.12.05...2022.12.07)

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

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

Author: dependabot[bot]

search-website-functions-v4/bulk-upload/requirements.txt

@@ -1,6 +1,6 @@
 azure-core==1.12.0
 azure-search-documents==11.2.0
-certifi==2020.12.5
+certifi==2022.12.7
 chardet==4.0.0
 idna==2.10
 isodate==0.6.0