fix(deps): update ui deps to v15.5.3

Author: renovate[bot]

ui/package-lock.json

@@ -6,7 +6,7 @@
     "@canonical/react-components": "3.0.1",
     "@ory/client": "1.22.1",
     "@ory/integrations": "1.3.1",
-    "next": "15.5.2",
+    "next": "15.5.3",
     "react": "19.1.1",
     "react-dom": "19.1.1",
     "sass": "1.92.1",
@@ -42,7 +42,7 @@
     ]
   },
   "devDependencies": {
-    "@next/eslint-plugin-next": "15.5.2",
+    "@next/eslint-plugin-next": "15.5.3",
     "@playwright/test": "1.55.0",
     "@testing-library/jest-dom": "6.8.0",
     "@testing-library/react": "16.3.0",