add changelog for v0.9 (#83)

Signed-off-by: haoqing0110 <[email protected]>

Signed-off-by: haoqing0110 <[email protected]>

Author: haoqing0110

CHANGELOG/CHANGELOG-v0.9.md

@@ -0,0 +1,20 @@
+# Changelog since v0.8.0
+All notable changes to this project will be documented in this file.
+
+## v0.9.0
+
+### New Features
+N/C
+
+### Added
+* Add new placement condition type `PlacementConditionMisconfigured` for configuration error and schedule failure. ([#72](https://github.com/open-cluster-management-io/placement/pull/72) [@haoqing0110](https://github.com/haoqing0110))
+* Introduce `cluster.open-cluster-management.io/experimental-scheduling-disable` annotation to allow disabling the scheduling. ([#80](https://github.com/open-cluster-management-io/placement/pull/80) [@clyang82](https://github.com/clyang82))
+
+### Changes
+* Upgrade golang modules. ([#78](https://github.com/open-cluster-management-io/placement/pull/78) [@haoqing0110](https://github.com/haoqing0110))
+
+### Bug Fixes
+* Fix the issue that placement doesn't trigger scheduling when cluster belongs to LabelSelector type clusterset. ([#81](https://github.com/open-cluster-management-io/placement/pull/81) [@haoqing0110](https://github.com/haoqing0110))
+
+### Removed & Deprecated
+* The `Placement` and `PlacementDecision` API v1alpha1 version will no longer be served in OCM v0.9.0. ([#290](https://github.com/open-cluster-management-io/open-cluster-management-io.github.io/pull/290) [@haoqing0110](https://github.com/haoqing0110))