build(deps-dev): Bump vitest from 2.1.5 to 2.1.9 (#22)

Bumps [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/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)

---
updated-dependencies:
- dependency-name: vitest
  dependency-type: direct:development
...

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package.json

@@ -24,7 +24,7 @@
     "msw": "^2.6.5",
     "tsup": "^8.3.5",
     "typescript": "^5.6.3",
-    "vitest": "^2.1.5"
+    "vitest": "^2.1.9"
   },
   "engines": {
     "node": ">=18"