Update CHANGELOG.md

Author: ibodrov

CHANGELOG.md

@@ -21,6 +21,9 @@ validation errors
 ([#1201](https://github.com/walmartlabs/concord/pull/1201));
 - concord-cli: do not call System.exit in RemoteSecretsProvider
 ([#1202](https://github.com/walmartlabs/concord/pull/1202));
+- concord-cli: ignore unknown properties in the CLI config
+file
+([#1203](https://github.com/walmartlabs/concord/pull/1203));
 - project: enable trimHeaderLine in license-maven-plugin
 ([#1205](https://github.com/walmartlabs/concord/pull/1205)).