GRAL-5870 fix vulnerabilities in custom-ui-floating-window-demo example app

Author: siirimangus

apps/custom-ui-floating-window-demo/package-lock.json

@@ -15,7 +15,7 @@
     "cookies-next": "^6.1.1",
     "eslint-config-next": "15.5.14",
     "form-data": "^4.0.5",
-    "next": "^15.5.14",
+    "next": "^15.5.15",
     "pino": "^8.7.0",
     "pino-pretty": "^9.1.1",
     "pipedrive": "^17.5.4",