chore(deps-dev): bump vitest in /packages/generative-experiences-js

Bumps [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) from 2.1.2 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
...

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

Author: dependabot[bot]

packages/generative-experiences-js/package.json

@@ -41,6 +41,6 @@
     "happy-dom": "^15.7.4",
     "htm": "^3.1.1",
     "preact": "^10.25.1",
-    "vitest": "2.1.2"
+    "vitest": "2.1.9"
   }
 }