chore(deps-dev): bump vitest and @vitest/coverage-istanbul

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

Updates `vitest` from 2.1.8 to 3.0.2
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v3.0.2/packages/vitest)

Updates `@vitest/coverage-istanbul` from 2.1.8 to 3.0.2
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v3.0.2/packages/coverage-istanbul)

---
updated-dependencies:
- dependency-name: vitest
  dependency-type: direct:development
  update-type: version-update:semver-major
- dependency-name: "@vitest/coverage-istanbul"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -16,14 +16,14 @@
     "@nextcloud/eslint-config": "^8.4.1",
     "@nextcloud/vite-config": "^1.5.0",
     "@pinia/testing": "^0.1.7",
-    "@vitest/coverage-istanbul": "^2.1.8",
+    "@vitest/coverage-istanbul": "^3.0.2",
     "@vue/test-utils": "^1.3.6",
     "@vue/tsconfig": "^0.5.1",
     "eslint-plugin-chai-friendly": "^1.0.1",
     "happy-dom": "^16.6.0",
     "typescript": "^5.7.3",
     "vite": "^5.4.2",
-    "vitest": "^2.0.3"
+    "vitest": "^3.0.2"
   },
   "engines": {
     "node": "^20.0.0",