Bump setuptools from 69.0.3 to 70.0.0 in /docs (#130)

Bumps [setuptools](https://github.com/pypa/setuptools) from 69.0.3 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@v69.0.3...v70.0.0)

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

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Author: dependabot[bot]

docs/requirements.txt

@@ -5,7 +5,7 @@ sphinxcontrib-matlabdomain==0.21.4
 sphinxcontrib-napoleon==0.7
 sphinx-math-dollar==1.2.1
 sphinxcontrib-bibtex==2.6.2
-setuptools==69.0.3 # Now required in python 3.12+
+setuptools==70.0.0 # Now required in python 3.12+
 myst-parser==2.0.0
 pyyaml==6.0.1