fix: add trailing slash to links to avoid extra redirects (#246)

Add trailing slash to links for improved consistency with RSS links and to avoid unnecessary redirects.

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Co-authored-by: satnaing <satnaingdev@gmail.com>

src/pages/rss.xml.ts

@@ -11,7 +11,7 @@ export async function GET() {
     description: SITE.desc,
     site: SITE.website,
     items: sortedPosts.map(({ data, slug }) => ({
-      link: `posts/${slug}`,
+      link: `posts/${slug}/`,
       title: data.title,
       description: data.description,
       pubDate: new Date(data.modDatetime ?? data.pubDatetime),