fix(deps): bump @nuxt/content from 1.15.1 to 2.9.0

Bumps [@nuxt/content](https://github.com/nuxt/content) from 1.15.1 to 2.9.0.
- [Release notes](https://github.com/nuxt/content/releases)
- [Changelog](https://github.com/nuxt/content/blob/main/CHANGELOG.md)
- [Commits](https://github.com/nuxt/content/compare/@nuxt/[email protected])

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

Signed-off-by: dependabot[bot] <[email protected]>