Bump certifi from 2023.7.22 to 2024.7.4 in /docs

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>

Author: dependabot[bot]

docs/requirements.txt

@@ -5,7 +5,7 @@ async-generator==1.10
 attrs==21.2.0
 backcall==0.2.0
 bleach==3.3.0
-certifi==2023.7.22
+certifi==2024.7.4
 cffi==1.14.5
 cvxopt==1.2.7
 cvxpy==1.1.13