Bump @stryker-mutator/vitest-runner from 8.5.0 to 8.6.0

Bumps [@stryker-mutator/vitest-runner](https://github.com/stryker-mutator/stryker-js/tree/HEAD/packages/vitest-runner) from 8.5.0 to 8.6.0.
- [Release notes](https://github.com/stryker-mutator/stryker-js/releases)
- [Changelog](https://github.com/stryker-mutator/stryker-js/blob/master/packages/vitest-runner/CHANGELOG.md)
- [Commits](https://github.com/stryker-mutator/stryker-js/commits/v8.6.0/packages/vitest-runner)

---
updated-dependencies:
- dependency-name: "@stryker-mutator/vitest-runner"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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