Bump setuptools from 65.5.1 to 70.0.0 in /docs

Bumps [setuptools](https://github.com/pypa/setuptools) from 65.5.1 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@v65.5.1...v70.0.0)

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

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

docs/requirements.txt

@@ -1,3 +1,3 @@
 sphinx==3.2.1
 Pallets-Sphinx-Themes==2.2.1
-setuptools==65.5.1
+setuptools==70.0.0