message: Update CHANGELOG for 0.18.5
diff: @@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
  The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
  and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
  -## Unreleased
  +## [0.18.5]
  ### Changed
  @@ -711,6 +711,7 @@ Some discrepancies with the TR remain, and are being tracked under https://githu
  Initial pre-release
  +[0.18.5]: https://github.com/microsoft/CCF/releases/tag/ccf-0.18.5
  [0.18.4]: https://github.com/microsoft/CCF/releases/tag/ccf-0.18.4
  [0.18.3]: https://github.com/microsoft/CCF/releases/tag/ccf-0.18.3
  [0.18.2]: https://github.com/microsoft/CCF/releases/tag/ccf-0.18.2
  