Bump setuptools from 68.0.0 to 70.0.0 in /docs

Bumps [setuptools](https://github.com/pypa/setuptools) from 68.0.0 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@v68.0.0...v70.0.0)

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

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

Author: dependabot[bot]

docs/requirements.txt

@@ -300,9 +300,9 @@ zipp==3.16.2 \
     # via importlib-metadata
 
 # The following packages are considered to be unsafe in a requirements file:
-setuptools==68.0.0 \
-    --hash=sha256:11e52c67415a381d10d6b462ced9cfb97066179f0e871399e006c4ab101fc85f \
-    --hash=sha256:baf1fdb41c6da4cd2eae722e135500da913332ab3f2f5c7d33af9b492acb5235
+setuptools==70.0.0 \
+    --hash=sha256:54faa7f2e8d2d11bcd2c07bed282eef1046b5c080d1c32add737d7b5817b1ad4 \
+    --hash=sha256:f211a66637b8fa059bb28183da127d4e86396c991a942b028c6650d4319c3fd0
     # via
     #   setuptools-scm
     #   towncrier