Bump certifi from 2023.7.22 to 2024.7.4 in /doc

Bumps [certifi](https://github.com/certifi/python-certifi) from 2023.7.22 to 2024.7.4.
- [Commits](certifi/python-certifi@2023.07.22...2024.07.04)

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

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

doc/requirements.txt

@@ -1,6 +1,6 @@
 alabaster==0.7.13
 Babel==2.12.1
-certifi==2023.7.22
+certifi==2024.7.4
 charset-normalizer==3.2.0
 docutils==0.17.1
 idna==3.7