Update items link with slugify function

src/pages/rss.xml.ts

@@ -2,6 +2,7 @@ import { SITE } from "src/config";
 import rss from "@astrojs/rss";
 import type { Frontmatter } from "src/types";
 import type { MarkdownInstance } from "astro";
+import slugify from "@utils/slugify";
 
 const postImportResult = import.meta.glob<MarkdownInstance<Frontmatter>>(
   "../contents/*.md",
@@ -17,7 +18,7 @@ export const get = () =>
     description: SITE.desc,
     site: SITE.website,
     items: posts.map(({ frontmatter }) => ({
-      link: frontmatter.slug,
+      link: slugify(frontmatter),
       title: frontmatter.title,
       description: frontmatter.description,
       pubDate: new Date(frontmatter.datetime),