message: CHANGELOG: mention deploy buffer metrics
diff: @@ -15,6 +15,7 @@ All notable changes to this project will be documented in this file. The format
  ### Added
  * Add `net-info` command to diagnostics port to gain insights into the nodes network connectivity state.
  +* Add metrics `deploy_buffer_total_deploys`, `deploy_buffer_held_deploys` and `deploy_buffer_dead_deploys` to report status of the node deploy buffer.
  ### Changed
  