YARN-4689. Fix up CHANGES.txt

hadoop-yarn-project/CHANGES.txt

@@ -34,8 +34,6 @@ Trunk - Unreleased
 
     YARN-3261. rewrite resourcemanager restart doc to remove roadmap bits (Gururaj Shetty via aw)
 
-    YARN-4689. FairScheduler: Cleanup preemptContainer to be more readable.
-    (Kai Sasaki via kasha)
 
   OPTIMIZATIONS
 
@@ -134,6 +132,10 @@ Release 2.9.0 - UNRELEASED
     YARN-4655. Log uncaught exceptions/errors in various thread pools in YARN.
     (Sidharta Seethana via vvasudev)
 
+    YARN-4689. FairScheduler: Cleanup preemptContainer to be more readable.
+    (Kai Sasaki via kasha)
+
+
   OPTIMIZATIONS
 
   BUG FIXES