Update setup.py to Python 3.12 support

[aaltat]

Because of uv says: DEBUG No compatible version found for: Python × No solution found when resolving dependencies: ╰─▶ Because the current Python version (3.12.4) does not satisfy Python>=3.8,<3.12 and robotframework-seleniumlibrary==6.5.0 depends on Python>=3.8,<3.12, we can conclude that robotframework-seleniumlibrary==6.5.0 cannot be used. And because you require robotframework-seleniumlibrary==6.5.0, we can conclude that the requirements are

See: https://github.com/MarketSquare/robotframework-seleniumlibrary-translation-fi/actions/runs/9587332276/job/26437128929

At least I think this is the reason.