docs: add an example for modifying index.vue in routeRules

[gaisinskii]

❓ 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)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

I think I've spent like an hour figuring out how to change the sitemap settings for the pages/index.vue so it might be useful for other folks also.

[vercel]

Someone is attempting to deploy a commit to the My Team Team on Vercel.

A member of the Team first needs to authorize it.

[harlan-zw]

Hey, thanks for the PR! Glad you could find a workaround, however, this as actually a bug.

I've pushed up a fix in the latest sitemap version nuxt-modules/sitemap@c1aaba9