build(deps-dev): Bump the vitest group with 3 updates

Bumps the vitest group with 3 updates: [@vitest/coverage-v8](https://github.com/vitest-dev/vitest/tree/HEAD/packages/coverage-v8), [@vitest/ui](https://github.com/vitest-dev/vitest/tree/HEAD/packages/ui) and [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest).


Updates `@vitest/coverage-v8` from 2.1.5 to 2.1.6
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v2.1.6/packages/coverage-v8)

Updates `@vitest/ui` from 2.1.5 to 2.1.6
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v2.1.6/packages/ui)

Updates `vitest` from 2.1.5 to 2.1.6
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v2.1.6/packages/vitest)

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

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

package.json

@@ -167,8 +167,8 @@
     "@typescript-eslint/eslint-plugin": "8.16.0",
     "@typescript-eslint/parser": "8.16.0",
     "@vates/toggle-scripts": "1.0.0",
-    "@vitest/coverage-v8": "2.1.5",
-    "@vitest/ui": "2.1.5",
+    "@vitest/coverage-v8": "2.1.6",
+    "@vitest/ui": "2.1.6",
     "chai": "5.1.2",
     "chai-each": "0.0.1",
     "chai-string": "1.5.0",
@@ -277,7 +277,7 @@
     "typescript-eslint": "8.16.0",
     "unified": "11.0.5",
     "vfile": "6.0.3",
-    "vitest": "2.1.5",
+    "vitest": "2.1.6",
     "yaml-eslint-parser": "1.2.3"
   },
   "engines": {