docs: fixed docs for svelte/store methods fromStore and toStore not being rendered

[marekdedic]

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Tests and linting

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I copied the doc comments from the source - am I missing some script that should do that automatically?

[changeset-bot]

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Latest commit: e55c763

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[Rich-Harris]

preview: https://svelte-dev-git-preview-svelte-14800-svelte.vercel.app/

this is an automated message