chore(deps): update dependency eslint-config-next to v15

Author: renovate[bot]

example/nextjs/package.json

@@ -20,7 +20,7 @@
     "@uiw/react-md-editor": "4.0.5",
     "autoprefixer": "^10.0.1",
     "eslint": "^8",
-    "eslint-config-next": "14.0.4",
+    "eslint-config-next": "15.2.1",
     "postcss": "^8",
     "tailwindcss": "^3.3.0",
     "typescript": "^5"