chore: make test less flaky

[dummdidumm]

hopefully switching to non-deprecated version + delaying (mimicking typing more closely) helps

[changeset-bot]

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Latest commit: 5704cbb

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[svelte-docs-bot]

Preview: https://svelte-dev-git-preview-kit-16205-svelte.vercel.app/

[teemingc]

Seen this used in my previous job for the same issue and it does help