add changelog for v0.8 (#77)

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

CHANGELOG/CHANGELOG-v0.8.md

@@ -0,0 +1,22 @@
+# Changelog since v0.4.0
+All notable changes to this project will be documented in this file.
+
+## v0.8.0
+
+### New Features
+N/C
+
+### Added
+* Support selecting clusters with [`labelSelector`](https://github.com/open-cluster-management-io/api/pull/150) defined in `ManagedClusterSet`. ([#73](https://github.com/open-cluster-management-io/placement/pull/73) [@ldpliu](https://github.com/ldpliu))
+
+### Changes
+* Upgrade golang modules. ([#69](https://github.com/open-cluster-management-io/placement/pull/69) [@haoqing0110](https://github.com/haoqing0110))
+* Upgrade golang builder. ([#70](https://github.com/open-cluster-management-io/placement/pull/70) [@elgnay](https://github.com/elgnay))
+* Upgrade golang to 1.18. ([#74](https://github.com/open-cluster-management-io/placement/pull/74) [@qiujian16](https://github.com/qiujian16))
+* Removed unused dockerfile cmd and passing IMAGE_TAG to make command. ([#71](https://github.com/open-cluster-management-io/placement/pull/71) [@yue9944882](https://github.com/yue9944882))
+
+### Bug Fixes
+N/C
+
+### Removed & Deprecated
+N/C