commands/operator-sdk/cmd/local: update changelog
### Added
-- Added `operator-sdk up` command to help deploy an operator. Currently supports running an operator locally against an existing cluster e.g `operator-sdk up local --kubeconfig=<path-to-kubeconfig> --namespace=<operator-namespace>`. See `operator-sdk up -h` for help. [#219](https://github.com/operator-framework/operator-sdk/pull/219)
+- Added `operator-sdk up` command to help deploy an operator. Currently supports running an operator locally against an existing cluster e.g `operator-sdk up local --kubeconfig=<path-to-kubeconfig> --namespace=<operator-namespace>`. See `operator-sdk up -h` for help. [#219](https://github.com/operator-framework/operator-sdk/pull/219) [#274](https://github.com/operator-framework/operator-sdk/pull/274)
### Changed
