Bump setuptools from 75.5.0 to 75.6.0 in /requirements

Bumps [setuptools](https://github.com/pypa/setuptools) from 75.5.0 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@v75.5.0...v75.6.0)

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

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

requirements/base.txt

@@ -12,4 +12,4 @@ psycopg2-binary==2.9.10
 django-autocomplete-light==3.11.0
 django-rq==3.0.0
 rq<2.1
-setuptools==75.5.0
+setuptools==75.6.0