Bump @nuxt/content from 2.8.5 to 2.9.0

Bumps [@nuxt/content](https://github.com/nuxt/content) from 2.8.5 to 2.9.0.
- [Release notes](https://github.com/nuxt/content/releases)
- [Changelog](https://github.com/nuxt/content/blob/main/CHANGELOG.md)
- [Commits](nuxt/content@v2.8.5...v2.9.0)

---
updated-dependencies:
- dependency-name: "@nuxt/content"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>