feat: add post update date (#243)

* feat: Add article update date

* feat:
1.Hide update time on the homepage;
2.Replace update icon;

* remove iconify-json/mdi

---------

Co-authored-by: liangjianhao <jianhao.liang@sz-sanjiang.com>

src/content/posts/markdown-extended.md

@@ -1,6 +1,7 @@
 ---
 title: Markdown Extended Features
 published: 2024-05-01
+updated: 2024-11-29
 description: 'Read more about Markdown features in Fuwari'
 image: ''
 tags: [Demo, Example, Markdown, Fuwari]