Bump setuptools from 70.0.0 to 75.6.0 in /docs (#1225)

Bumps [setuptools](https://github.com/pypa/setuptools) from 70.0.0 to 75.6.0.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](pypa/setuptools@v70.0.0...v75.6.0)

---
updated-dependencies:
- dependency-name: setuptools
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Shauna Gordon-McKeon <[email protected]>

requirements.txt

@@ -30,7 +30,7 @@ PyGitHub==2.4.0
 python-dateutil==2.8.2
 requests==2.32.3
 requests_oauthlib==2.0.0
-setuptools==70.0.0
+setuptools==75.6.0
 simple-salesforce==1.11.6
 simplejson==3.16.0
 slackclient==1.3.0