Bump vitest from 2.1.1 to 2.1.9 in /webserver in the npm_and_yarn group

Bumps the npm_and_yarn group in /webserver with 1 update: [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest).


Updates `vitest` from 2.1.1 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
  dependency-group: npm_and_yarn
...

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

Author: dependabot[bot]

webserver/package.json

@@ -60,6 +60,6 @@
     "@types/n3": "^1.21.1",
     "@types/node": "^22.13.5",
     "dotenv-cli": "^8.0.0",
-    "vitest": "^2.1.1"
+    "vitest": "^2.1.9"
   }
 }