Fix YARN-1697 in CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1567554 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/CHANGES.txt

@@ -231,7 +231,7 @@ Release 2.4.0 - UNRELEASED
     YARN-1698. Fixed default TimelineStore in code to match what is documented
     in yarn-default.xml (Zhijie Shen via vinodkv)
 
-    YARN=1697. NodeManager reports negative running containers (Sandy Ryza)
+    YARN-1697. NodeManager reports negative running containers (Sandy Ryza)
 
     YARN-1719. Fixed the root path related Jersey warnings produced in
     ATSWebServices. (Billie Rinaldi via zjshen)