Update to 2.6.1 (#2171)

* Updating to version 2.6.1

* Add 'Fixed' header to changelog

Author: namespacebrian

CHANGELOG.md

@@ -1,8 +1,9 @@
 # Change Log
 All notable changes to this project will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org)
 
-## MASTER
+## 2.6.1 - 2021-08-04
 
+### Fixed
 - Fix `backup:automatic:enable --keep-for` parameter not being respected (#2166)
 
 ## 2.6.0 - 2021-06-04

config/constants.yml

@@ -7,7 +7,7 @@
 ---
 
 # App
-TERMINUS_VERSION: '2.6.1-dev'
+TERMINUS_VERSION: '2.6.1'
 
 # Connectivity
 TERMINUS_HOST:      'terminus.pantheon.io'