YARN-2224. Fix CHANGES.txt. This was committed as YARN-2204 before.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1609583 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/CHANGES.txt

@@ -218,7 +218,7 @@ Release 2.5.0 - UNRELEASED
     YARN-614. Changed ResourceManager to not count disk failure, node loss and
     RM restart towards app failures. (Xuan Gong via jianhe)
 
-    YARN-2204. Explicitly enable vmem check in
+    YARN-2224. Explicitly enable vmem check in
     TestContainersMonitor#testContainerKillOnMemoryOverflow.
     (Anubhav Dhoot via kasha)