fix(prerender): ensure / exists inside prerender rotues

[farnabaz]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[cloudflare-workers-and-pages]

Deploying nuxt-content with    Cloudflare Pages

Latest commit:	48d10a3
Status:	✅  Deploy successful!
Preview URL:	https://b9c3b835.nuxt-content-1il.pages.dev
Branch Preview URL:	https://prerender-home.nuxt-content-1il.pages.dev

View logs

[stefanprobst]

@farnabaz i think this breaks nuxt/i18n, which intentionally removes "/" from prerendering so redirecting to "/en" still works. see nuxt-modules/i18n#2894

[ptdev]

@farnabaz i think this breaks nuxt/i18n, which intentionally removes "/" from prerendering

Confirming that it did indeed break i18n. See #2678

[ydnar]

This PR, with its unilateral addition of / to the prerender list, broke production for us.