refactor: change style.innerHTML to style.textContent

[sapphi-red]

Description

It seems innerHTML and textContent isn't different for style tags. If there isn't any difference, I think we should use textContent to reduce CSP requirements.

refs #10553

Additional context

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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[patak-dev]

/ecosystem-ci run

[vite-ecosystem-ci]

📝 Ran ecosystem CI: Open

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histoire	✅ success
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vite-plugin-ssr	✅ success
vite-setup-catalogue	✅ success
vitepress	✅ success
vitest	✅ success
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