fix windows CI for kaleido unittests

[andrei-ng]

The following unittests no longer pass in the CI for windows-latest

test tests::test_save_eps ... ignored
test tests::test_save_pdf ... ok
test tests::test_save_svg ... ok
test tests::test_save_jpeg ... ok
test tests::test_save_png ... ok
test tests::test_save_webp ... ok

This PR #190 disables these tests for Windows OS. To find the issue and re-enable them.

[andrei-ng]

Now, MacOS tests are getting stuck

test plot::tests::test_save_html ... ok
test plot::tests::test_save_to_jpeg has been running for over 60 seconds
test plot::tests::test_save_to_pdf has been running for over 60 seconds
test plot::tests::test_save_to_png has been running for over 60 seconds

see e.g., https://github.com/plotly/plotly.rs/actions/runs/9565314171/job/26367982758