gh-actions: run cibuildwheel using Python 3.14

[GlassOfWhiskey]

This commit adds support for Python 3.14 wheels

[mr-c]

Sure, but this is just the version of Python used to run cibuildwheel; not the version to build wheels for.

Python 3.14 wheels are already built and published: https://pypi.org/project/schema-salad/?abis=cp314#files

The configuration for cibuildwheel is controlled in

schema_salad/pyproject.toml

Line 22 in ade85fb

skip = ["pp*", "cp31?t-*"]

[mr-c]

I manually kicked off the edited workflow at https://github.com/common-workflow-language/schema_salad/actions/runs/19429195340

[mr-c]

Interestingly, their docs are inconsistent, they don't use setup-python here: https://cibuildwheel.pypa.io/en/stable/ci-services/#github-actions but they do use setup-python (without a version range) here: https://github.com/pypa/cibuildwheel?tab=readme-ov-file#example-setup ; in fact their action handles setup-python as a step, so we can probably remove it from our configuration: https://github.com/pypa/cibuildwheel/blob/63fd63b352a9a8bdcc24791c9dbee952ee9a8abc/action.yml#L31-L35