JavaScript で CORS policy のエラーが出る

(async () => {
    const url = "https://kenkoooo.com/atcoder/atcoder-api/v3/language_list";
    const option = { method: "GET", mode: "cors", cache: "force-cache" };
    const res = await fetch(url, option);
    const text = await res.text();
    console.log(text);
  })();

上記のようなスクリプトを atcoder.jp 上で実行すると、次のようなエラーが出て、ファイルの取得ができないのですが、解決する方法があれば教えていただけませんか

Access to fetch at 'https://kenkoooo.com/atcoder/atcoder-api/v3/language_list' from origin 'https://atcoder.jp' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

kenkoooo / AtCoderProblems

JavaScript で CORS policy のエラーが出る #1471