Update dependency vitest to v2.1.9 [SECURITY]

Author: renovate[bot]

frontend/package.json

@@ -39,7 +39,7 @@
 		"tslib": "2.7.0",
 		"typescript": "5.5.4",
 		"vite": "5.4.2",
-		"vitest": "2.0.5"
+		"vitest": "2.1.9"
 	},
 	"dependencies": {
 		"@sveltejs/adapter-node": "5.2.2",