Bump setuptools from 75.1.0 to 75.6.0 in /.github

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: berndgassmann <bernd.gassmann@intel.com>

.github/workflows/requirements.txt

@@ -7,7 +7,7 @@ pygccxml==2.6.0
 Pygments==2.18.0
 pymdown-extensions==10.12
 pyplusplus==1.8.5
-setuptools==75.1.0
+setuptools==75.6.0
 six==1.16.0
 testresources==2.0.1
 unittest-xml-reporting==3.2.0