doc: Update README.md #2

Author: jaywcjlove

README.md

@@ -17,6 +17,12 @@
   </p>
 </div>
 
+<div align="center">
+
+minimum OS requirement: `macOS 14.0`
+
+</div>
+
 "DevTutor for SwiftUI" is an application designed to assist developers in creating exceptional apps using SwiftUI. It offers replicable code samples and corresponding UI previews to streamline your coding process. Additionally, it includes local offline access to the official Swift Programming Language documentation in both Chinese and English.
 
 ![DevTutor for SwiftUI screenshots-1](./assets/screenshots-1-all.png)

README.zh.md

@@ -17,6 +17,12 @@
   </p>
 </div>
 
+<div align="center">
+
+最低操作系统要求：`macOS 14.0`
+
+</div>
+
 「DevTutor」是一款旨在帮助开发者使用 SwiftUI 创建出色应用程序的应用。它提供可复制的代码示例和相应的用户界面预览，以简化您的编码过程。此外，还包括了《Swift 编程语言》官方中英文文档的本地离线预览。
 
 ![DevTutor for SwiftUI screenshots-1](./assets/screenshots-1-all.png)