Fix flaky tests

[mizdra]

close: #283

Address the following flaky test:

• https://github.com/mizdra/css-modules-kit/actions/runs/20397194416/job/58614372999
• https://github.com/mizdra/css-modules-kit/actions/runs/20396900564/job/58613741710

I will ignore the following tests because the cause is unknown.

• https://github.com/mizdra/css-modules-kit/actions/runs/20396900564/job/58613741707

[changeset-bot]

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Latest commit: 823b66a

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