Update CHANGELOG.md

Author: brig

CHANGELOG.md

@@ -21,6 +21,8 @@ step name
 - concord-server: split ConcordAuthenticationHandler into
 separate handlers
 ([#1026](https://github.com/walmartlabs/concord/pull/1026));
+- mocks-task: record task events for mocked tasks
+([#1027](https://github.com/walmartlabs/concord/pull/1027));
 - concord-server: fix session token handling
 ([#1032](https://github.com/walmartlabs/concord/pull/1032)).