add changelog for v0.4 (#68)

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

Author: haoqing0110

CHANGELOG/CHANGELOG-v0.4.md

@@ -0,0 +1,21 @@
+# Changelog since v0.3.0
+All notable changes to this project will be documented in this file.
+
+## v0.4.0
+
+### New Features
+* Add filter plugin taint toleration. Users are able to filter clusters via taints and tolerations. ([#63](https://github.com/open-cluster-management-io/placement/pull/63) [#64](https://github.com/open-cluster-management-io/placement/pull/64) [#66](https://github.com/open-cluster-management-io/placement/pull/66) [@haoqing0110](https://github.com/haoqing0110))
+
+### Added
+N/C
+
+### Changes
+* Update `Placement` and `PlacementDecision` api version to v1beta1. ([#60](https://github.com/open-cluster-management-io/placement/pull/60) [@haoqing0110](https://github.com/haoqing0110))
+* Integrates placement with `ManagedClusterSet` [changes](https://github.com/open-cluster-management-io/api/pull/141) and supports `ManagedClusterSet` with `LegacyClusterSetLabel`. ([#65](https://github.com/open-cluster-management-io/placement/pull/65) [@haoqing0110](https://github.com/haoqing0110))
+* Avoid building latest image in release branch. ([#67](https://github.com/open-cluster-management-io/placement/pull/67) [@qiujian16](https://github.com/qiujian16))
+
+### Bug Fixes
+N/C
+
+### Removed & Deprecated
+N/C