chore: update xmlbuilder2 to v4.0.0 to fix npm audit vulnerabilitiy warnings (#5902)

Author: phoefflin

packages/start-plugin-core/package.json

@@ -80,7 +80,7 @@
     "tinyglobby": "^0.2.15",
     "ufo": "^1.5.4",
     "vitefu": "^1.1.1",
-    "xmlbuilder2": "^3.1.1",
+    "xmlbuilder2": "^4.0.0",
     "zod": "^3.24.2"
   },
   "devDependencies": {