Updated CHANGES.txt for YARN-4328.

hadoop-yarn-project/CHANGES.txt

@@ -62,6 +62,8 @@ Release 2.6.5 - 2016-10-08
 
     YARN-4794. Deadlock in NMClientImpl (Jian He via Rohith Sharma K S)
 
+    YARN-4328. Fix findbugs warnings in resourcemanager (Akira Ajisaka via Varun Saxena)
+
 Release 2.6.4 - 2016-02-11
 
   INCOMPATIBLE CHANGES