core: update changelog

Author: gsanchezgavier

CHANGELOG.md

@@ -5,12 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## 2.6.0 (2021-06-05)
+## 2.6.0 (2021-10-05)
 ## Changed
 - Update Go to v1.16.
 - Migrate to Go Modules
 - Update Infrastracture SDK to v3.6.7.
 - Update other dependecies.
+
 ## 2.5.4 (2021-04-06)
 ### Added
 - `ExtraConnectionURLArgs` argument allowing to specify custom connection strings