typescript + eslint, strange error

gistfile1.txt

import { ReactElement } from "react";

import { frontMatter as blogPosts } from "./blog/*.mdx";
import BlogPost from "../components/blog-post";

const Blog = (): ReactElement[] =>
  blogPosts.map((frontMatter) => (
    <BlogPost key={frontMatter.title} {...frontMatter} />
  ));

export default Blog;