YARN-3429. Fix incorrect CHANGES.txt

(cherry picked from commit 5b8a3ae366294aec492f69f1a429aa7fce5d13be)

hadoop-yarn-project/CHANGES.txt

@@ -100,7 +100,7 @@ Release 2.8.0 - UNRELEASED
     YARN-2666. TestFairScheduler.testContinuousScheduling fails Intermittently.
     (Zhihai Xu via ozawa)
 
-    YARN-2429. TestAMRMTokens.testTokenExpiry fails Intermittently with
+    YARN-3429. TestAMRMTokens.testTokenExpiry fails Intermittently with
     error message:Invalid AMRMToken (zxu via rkanter)
 
     YARN-3110. Few issues in ApplicationHistory web ui. (Naganarasimha G R via xgong)