Cannot loop blog posts

## Description
As far as I can tell, I have the same templating code in [blog.md](https://github.com/clearlyTHUYDOAN/clearlythuydoan.com/blob/feature/setup-eleventy/src/blog.md) but I cannot get the list items to show up 😢

Course reference: https://egghead.io/lessons/11ty-define-an-eleventy-11ty-collection-to-create-a-blog 📖

## Reproduction

**Ask: Are you able to spot why I cannot get the blog posts to loop as list items?** 🕵️‍♀️

Source code: https://github.com/clearlyTHUYDOAN/clearlythuydoan.com/tree/feature/setup-eleventy 🔖

這個 issue 涉及一個 Eleventy 部落格，其中的文章沒有作為清單項目進行迴圈。檢查 blog.md 範本，並將其與課程參考進行比較。查看 Eleventy collection 設定和 data cascade。驗證範本中的 front matter 和迴圈語法。在本機執行 Eleventy build 即可看到輸出。

由索引模型根據 Issue 內容生成。