Update change log with appropriate release year

CHANGELOG.md

@@ -3,13 +3,13 @@ All notable changes to this project 2.6.x per each release will be documented in
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
-## [v2.6.0.6] - 2018-06-20
+## [v2.6.0.6] - 2019-06-20
 
 ### Added
 
 - Added resources for deployment of kubernetes manifests and helm charts on AKS using Azurefiles as persistent storage instead of NFS.
 
-## [v2.6.0.5] - 2018-06-13
+## [v2.6.0.5] - 2019-06-13
 
 ### Added
 - Kubernetes resources for WSO2 API Management deployment pattern 3
@@ -18,12 +18,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Fix an issue with creating WSO2 Subscription Kubernetes Secret in WSO2 API Management Helm resources
 (see [issue](https://github.com/wso2/kubernetes-apim/issues/190))
 
-## [v2.6.0.4] - 2018-05-27
+## [v2.6.0.4] - 2019-05-27
 
 ### Changed
 - Fix an issue which comments out Kubernetes client commands in the deployment management script of WSO2 API Manager deployment pattern 2
 
-## [v2.6.0.3] - 2018-05-25
+## [v2.6.0.3] - 2019-05-25
 
 ### Added
 - Kubernetes resources for a simplified, WSO2 API Manager with Analytics deployment