Bump certifi from 2024.6.2 to 2024.7.4 in /requirements

Bumps [certifi](https://github.com/certifi/python-certifi) from 2024.6.2 to 2024.7.4.
- [Commits](certifi/python-certifi@2024.06.02...2024.07.04)

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

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

requirements/checkdocs.txt

@@ -14,7 +14,7 @@ babel==2.14.0
     # via sphinx
 build==1.0.3
     # via pip-tools
-certifi==2024.6.2
+certifi==2024.7.4
     # via requests
 charset-normalizer==3.3.2
     # via requests