fix[java juc atomic]: update correct chapter name

jinyahuan · jinyahuan · commit 4bba8d365ae0 · 2019-05-03T12:09:04.000+08:00
diff --git a/docs/java/Multithread/Atomic.md b/docs/java/Multithread/Atomic.md
@@ -326,7 +326,7 @@ currentValue=0, currentStamp=0
 currentValue=666, currentStamp=999, wCasResult=true
 ```
 
-#### 4.4 AtomicStampedReference &#31867;&#20351;&#29992;&#31034;&#20363;
+#### 4.4 AtomicMarkableReference &#31867;&#20351;&#29992;&#31034;&#20363;
 
 ``` java
 import java.util.concurrent.atomic.AtomicMarkableReference;

-Original file line number
+Diff line change
 currentValue=666, currentStamp=999, wCasResult=true
 ```
 -#### 4.4 AtomicStampedReference 类使用示例
 +#### 4.4 AtomicMarkableReference 类使用示例
 ``` java
 import java.util.concurrent.atomic.AtomicMarkableReference;