Bump vitest from 4.1.0 to 4.1.9 in /src/js-host-api/examples/mcp-server

Bumps [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) from 4.1.0 to 4.1.9.
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Changelog](https://github.com/vitest-dev/vitest/blob/main/docs/releases.md)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.1.9/packages/vitest)

---
updated-dependencies:
- dependency-name: vitest
  dependency-version: 4.1.9
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

src/js-host-api/examples/mcp-server/package-lock.json

@@ -14,7 +14,7 @@
         "zod": "^3.25.0"
     },
     "devDependencies": {
-        "vitest": "^4.1.0"
+        "vitest": "^4.1.9"
     },
     "engines": {
         "node": ">= 20"