build(deps): update setuptools requirement in /requirements

Updates the requirements on [setuptools](https://github.com/pypa/setuptools) to permit the latest version.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](pypa/setuptools@v70.2.0...v70.3.0)

---
updated-dependencies:
- dependency-name: setuptools
  dependency-type: direct:production
...

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

requirements/gha-package.txt

@@ -1,5 +1,5 @@
 twine ==5.1.*
-setuptools ==70.2.*
+setuptools ==70.3.*
 wheel ==0.43.*
 build ==1.2.*
 importlib_metadata ==8.0.*