fix: use correct vitest version in playwright + vitest template

[jarrodldavis]

Please don't delete this checklist! Before submitting the PR, please make sure you do the following:

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[changeset-bot]

🦋 Changeset detected

Latest commit: 28b6aad

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
create-svelte	Patch

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[benmccann]

thank you!

p.s. next time if you leave "allow edits from maintainers" checked I can just merge it without waiting for you to address the comment

[jarrodldavis]

@benmccann Yeah I didn't realize that would default to unchecked when creating the PR using the GitHub CLI. I'll be sure to keep it checked next time!