Bump setuptools from 68.1.2 to 70.0.0 in /docs

Bumps [setuptools](https://github.com/pypa/setuptools) from 68.1.2 to 70.0.0.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](pypa/setuptools@v68.1.2...v70.0.0)

---
updated-dependencies:
- dependency-name: setuptools
  dependency-type: indirect
...

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

docs/requirements.txt

@@ -92,5 +92,5 @@ urllib3==2.0.4
     # via requests
 
 # The following packages are considered to be unsafe in a requirements file:
-setuptools==68.1.2
+setuptools==70.0.0
     # via setuptools-scm