Update CHANGELOG.md

Author: ludoo

CHANGELOG.md

@@ -3,6 +3,9 @@
 All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
+
+## [1.6.0] - 2020-05-20
+
 - add output to `gke-cluster` exposing the cluster's CA certificate
 - fix `gke-cluster` autoscaling options
 - add support for Service Directory bound zones to the `dns` module
@@ -62,7 +65,8 @@ All notable changes to this project will be documented in this file.
 
 - merge development branch with suite of new modules and end-to-end examples
 
-[Unreleased]: https://github.com/terraform-google-modules/cloud-foundation-fabric/compare/v1.5.0...HEAD
+[Unreleased]: https://github.com/terraform-google-modules/cloud-foundation-fabric/compare/v1.6.0...HEAD
+[1.6.0]: https://github.com/terraform-google-modules/cloud-foundation-fabric/compare/v1.5.0...v1.6.0
 [1.5.0]: https://github.com/terraform-google-modules/cloud-foundation-fabric/compare/v1.4.1...v1.5.0
 [1.4.1]: https://github.com/terraform-google-modules/cloud-foundation-fabric/compare/v1.4.0...v1.4.1
 [1.4.0]: https://github.com/terraform-google-modules/cloud-foundation-fabric/compare/v1.3.0...v1.4.0