CHANGELOG.md: update changelog

Author: AlexNPavel

CHANGELOG.md

@@ -3,6 +3,7 @@
 ### Changed
 
 - The SDK now uses logr as the default logger to unify the logging output with the controller-runtime logs. Users can still use a logger of their own choice. See the [logging doc](https://github.com/operator-framework/operator-sdk/blob/master/doc/user/logging.md) on how the SDK initializes and uses logr.
+- Add `no-setup` flag to `test local` subcommand ([#770](https://github.com/operator-framework/operator-sdk/pull/770))
 
 ### Bug fixes