feat: Vercelの設定を上書きしてみる

[takara2314]

cloudflare/next-on-pages#908 に沿って次のようなエラーに立ち向かう

"logs": [
    {
      "message": [
        "Error: No such module \"__next-on-pages-dist__/functions/async_hooks\".\n  imported from \"__next-on-pages-dist__/functions/index.func.js\""
      ],
      "level": "error",
      "timestamp": 1743869322578
    }
  ],