chore(deps): Bump setuptools in /backend/python/diffusers

Bumps [setuptools](https://github.com/pypa/setuptools) from 75.1.0 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@v75.1.0...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>

backend/python/diffusers/requirements-intel.txt

@@ -3,7 +3,7 @@ intel-extension-for-pytorch
 torch
 torchvision
 optimum[openvino]
-setuptools==75.1.0 # https://github.com/mudler/LocalAI/issues/2406
+setuptools==75.6.0 # https://github.com/mudler/LocalAI/issues/2406
 diffusers
 opencv-python
 transformers