deps(frontend)(deps-dev): bump the testing group (#1000)

Bumps the testing group in /frontend with 2 updates: [@vitest/coverage-v8](https://github.com/vitest-dev/vitest/tree/HEAD/packages/coverage-v8) and [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest).


Updates `@vitest/coverage-v8` from 4.1.0 to 4.1.2
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.1.2/packages/coverage-v8)

Updates `vitest` from 4.1.0 to 4.1.2
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.1.2/packages/vitest)

---
updated-dependencies:
- dependency-name: "@vitest/coverage-v8"
  dependency-version: 4.1.2
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: testing
- dependency-name: vitest
  dependency-version: 4.1.2
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: testing
...

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

Author: dependabot[bot]

frontend/package-lock.json

@@ -72,7 +72,7 @@
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
     "@vitejs/plugin-react": "^5.1.4",
-    "@vitest/coverage-v8": "^4.1.0",
+    "@vitest/coverage-v8": "^4.1.2",
     "axe-core": "^4.11.1",
     "eslint": "^9.39.4",
     "eslint-config-next": "16.2.1",