deps: bump vitest from 4.1.5 to 4.1.6 in the vitest group

Bumps the vitest group with 1 update: [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest).


Updates `vitest` from 4.1.5 to 4.1.6
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.1.6/packages/vitest)

---
updated-dependencies:
- dependency-name: vitest
  dependency-version: 4.1.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: vitest
...

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Author: dependabot[bot]