Update @vitest/coverage-v8 to version 2.1.9 in package.json and package-lock.json

Author: jkestering-modus

frontend/package-lock.json

@@ -89,7 +89,7 @@
     "@typescript-eslint/parser": "8.19.1",
     "@vitejs/plugin-legacy": "6.0.0",
     "@vitejs/plugin-react": "4.3.4",
-    "@vitest/coverage-v8": "2.1.8",
+    "@vitest/coverage-v8": "2.1.9",
     "cypress": "13.17.0",
     "eslint": "9.17.0",
     "eslint-plugin-react": "7.37.3",