Bump setuptools from 75.3.0 to 75.4.0

Bumps [setuptools](https://github.com/pypa/setuptools) from 75.3.0 to 75.4.0.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](pypa/setuptools@v75.3.0...v75.4.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements/testing.txt

@@ -8,6 +8,6 @@ pylint==3.3.1
 pytest==8.3.3
 pytest-cov==6.0.0
 pytest-timeout==2.3.1
-setuptools==75.3.0
+setuptools==75.4.0
 twine==5.1.1
 mypy==1.13.0