CHANGELOG: add entry for Docker health check
# Changelog
## Unreleased
-* Feature - Support a HTTP endpoint for `awsvpc` tasks to query metadata
+* Feature - Support a HTTP endpoint for `awsvpc` tasks to query metadata.
+* Feature - Support Docker health check.
* Bug - Fixed a bug where `-version` fails due to its dependency on docker client. [#1118](https://github.com/aws/amazon-ecs-agent/pull/1118)
-* Bug - Persist container exit code in agent state file [#1125](https://github.com/aws/amazon-ecs-agent/pull/1125)
+* Bug - Persist container exit code in agent state file. [#1125](https://github.com/aws/amazon-ecs-agent/pull/1125)
## 1.16.2
* Bug - Fixed a bug where the ticker would submit empty container state change
