Used .smol-centering in a project

Your writing and your code demos are helpful. I used [this demo](https://smolcss.dev/#smol-grid-centering) to create [a code editor for touchscreens](https://github.com/enderminyard/phonecoding). Thanks for making this!

This is a thank-you note, not a task. The user shares a project link using the smol-centering demo. For a newcomer, there is no actionable work described. The issue is informational and can be closed or acknowledged.

索引モデルが issue の本文から書いたものです。