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/audioer/" 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>
     <a target="_blank" href="https://wangchujiang.com/file-sentinel/" title="FileSentinel for macOS"><img align="center" alt="FileSentinel" height="52" width="52" src="https://github.com/user-attachments/assets/28bce2cc-290e-45bf-9068-585ff6ecafe9"></a>
     <a target="_blank" href="https://wangchujiang.com/focus-cursor/" title="FocusCursor for macOS"><img align="center" alt="FocusCursor" height="52" width="52" src="https://github.com/user-attachments/assets/d543668a-737b-4853-a6bb-eaa269e69836"></a>
     <a target="_blank" href="https://wangchujiang.com/videoer/" title="Videoer for macOS"><img align="center" alt="Videoer" height="52" width="52" src="https://github.com/user-attachments/assets/12c02a7a-109e-4048-91f4-ab2dfd1e264e"></a>