Bump setuptools from 70.0.0 to 78.1.1 in /docs

Bumps [setuptools](https://github.com/pypa/setuptools) from 70.0.0 to 78.1.1.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](pypa/setuptools@v70.0.0...v78.1.1)

---
updated-dependencies:
- dependency-name: setuptools
  dependency-version: 78.1.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -1,3 +1,3 @@
 sphinx==3.2.1
 Pallets-Sphinx-Themes==2.2.1
-setuptools==70.0.0
+setuptools==78.1.1