docs: 在贡献文档中添加专门针对 macOS 的 JDK 版本检查命令 (#5165)

docs/Contributing.md

@@ -28,7 +28,7 @@ OpenJDK 64-Bit Server VM (build 25+37-LTS, mixed mode, sharing)
 </details>
 
 <details>
-<summary>Linux/macOS/FreeBSD</summary>
+<summary>Linux/FreeBSD</summary>
 
 ```
 > $JAVA_HOME/bin/java -version
@@ -39,6 +39,18 @@ OpenJDK 64-Bit Server VM (build 25+37-LTS, mixed mode, sharing)
 
 </details>
 
+<details>
+<summary>macOS</summary>
+
+```
+> /usr/libexec/java_home --exec java -version
+openjdk version "25" 2025-09-16 LTS
+OpenJDK Runtime Environment (build 25+37-LTS)
+OpenJDK 64-Bit Server VM (build 25+37-LTS, mixed mode, sharing)
+```
+
+</details>
+
 ### Get HMCL Source Code
 
 - You can get the latest source code via [Git](https://git-scm.com/downloads):