chore(renovate): update extends in renovate (#2567)

related nuxt/modules#887

[ ] 📖 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)
[x] 🧹 Chore (updates to the build process or auxiliary tools and libraries)

The usage of nuxt/renovate-config-nuxt has been updated. Therefore, it has been fixed in this PR.

{
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "extends": [
-   "@nuxtjs"
+   "github>nuxt/renovate-config-nuxt",
  ]
}

The WARN that is occurring in #957 will be resolved with this fix. related nuxt/renovate-config-nuxt#58 .

WARN: Using npm packages for Renovate presets is now deprecated. Please migrate to repository-based presets instead.

The Renovate bot is currently working fine. Therefore, the priority of this pull request is low. Please review when you have a time. 🙏

nuxt / content