doc: Update README.md

Author: jaywcjlove

README.md

@@ -10,6 +10,7 @@ Render Markdown text in SwiftUI. It is a preview based on the [`Marked`](https:/
 ✦ My macOS/iOS application ✦
 
 <p style="display: inline_block">
+    <a target="_blank" href="https://wangchujiang.com/mousio-hint/" title="Mousio Hint for macOS"><img align="center" alt="Mousio Hint" height="52" width="52" src="https://github.com/user-attachments/assets/3c0af128-0cef-44e5-a8db-4741dc5a6690"></a>
     <a target="_blank" href="https://apps.apple.com/app/6746747327" title="Mousio for macOS"><img align="center" alt="Mousio" height="52" width="52" src="https://github.com/user-attachments/assets/9edf61ff-5a6c-4676-9cc2-8fd3c1ad0dfb"></a>
     <a target="_blank" href="https://apps.apple.com/app/6745227444" title="Musicer for macOS"><img align="center" alt="Musicer" height="52" width="52" src="https://github.com/user-attachments/assets/b7abfba8-88ff-4c86-a125-43073d5aef22"></a>
     <a target="_blank" href="https://apps.apple.com/app/6743841447" title="Audioer for macOS"><img align="center" alt="Audioer" height="52" width="52" src="https://github.com/user-attachments/assets/7a836865-8c90-4119-87bc-19e06a76c957"></a>