i18n(ko-KR): update tutorial/6-islands/4.mdx (#10358)

Co-authored-by: Yan <[email protected]>

src/content/docs/ko/tutorial/6-islands/4.mdx

@@ -170,7 +170,7 @@ import { Steps } from '@astrojs/starlight/components';
     import MarkdownPostLayout from '../../layouts/MarkdownPostLayout.astro';
 
     export async function getStaticPaths() {
-      const posts = await getCollection('posts');
+      const posts = await getCollection('blog');
       return posts.map(post => ({
         params: { slug: post.id }, props: { post },
       }));