Bump vitest and @vitest/coverage-v8 (#1189)

Bumps [vitest](/~https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) and [@vitest/coverage-v8](/~https://github.com/vitest-dev/vitest/tree/HEAD/packages/coverage-v8). These dependencies needed to be updated together.

Updates `vitest` from 2.1.5 to 2.1.9
- [Release notes](/~https://github.com/vitest-dev/vitest/releases)
- [Commits](/~https://github.com/vitest-dev/vitest/commits/v2.1.9/packages/vitest)

Updates `@vitest/coverage-v8` from 2.1.5 to 2.1.9
- [Release notes](/~https://github.com/vitest-dev/vitest/releases)
- [Commits](/~https://github.com/vitest-dev/vitest/commits/v2.1.9/packages/coverage-v8)

---
updated-dependencies:
- dependency-name: vitest
  dependency-type: direct:development
- dependency-name: "@vitest/coverage-v8"
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>