CI: Require Python >= 3.13.5 on Windows by hugovk · Pull Request #9017

CI: Require Python >= 3.13.5 on Windows by hugovk · Pull Request #9017 · python-pillow/Pillow

Some Windows jobs are failing because it's Python 3.13.4, which incorrectly tries to link to the threaded version. See python/cpython#135151

This has been fixed in this week's 3.13.5 release, but it's not necessarily in the default CI images yet, so let's specify >= 3.13.5 to ensure the new one is always installed on-demand.

We can revert this at some point in the future.