chore(deps-dev): bump @nuxt/test-utils from 3.15.1 to 3.15.4

Bumps [@nuxt/test-utils](https://github.com/nuxt/test-utils) from 3.15.1 to 3.15.4.
- [Release notes](https://github.com/nuxt/test-utils/releases)
- [Changelog](https://github.com/nuxt/test-utils/blob/main/CHANGELOG.md)
- [Commits](nuxt/test-utils@v3.15.1...v3.15.4)

---
updated-dependencies:
- dependency-name: "@nuxt/test-utils"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]