Update README.md

Author: Snailclimb

README.md

@@ -110,6 +110,7 @@
 
 * [Java 8 新特性总结](docs/java/What's%20New%20in%20JDK8/Java8Tutorial.md)
 * [Java 8 学习资源推荐](docs/java/What's%20New%20in%20JDK8/Java8教程推荐.md)
+* [Java8 forEach 指南](docs/java/What's%20New%20in%20JDK8/Java8foreach指南.md)
 
 ### 编程规范