Update the changelog for the release v0.5.0 (#348)

Signed-off-by: Daxin Wang <[email protected]>

CHANGELOG.md

@@ -3,7 +3,7 @@
 1. All notable changes to this project will be documented in this file.
 2. Records in this file are not identical to the title of their Pull Requests. A detailed description is necessary for understanding what changes are and why they are made.
 
-## Unreleased 
+## v0.5.0 - 2022-11-02
 ### New features
 - Add a new feature: Trace Profiling. See more details about it on our [website](http://kindling.harmonycloud.cn). ([#335](https://github.com/CloudDectective-Harmonycloud/kindling/pull/335))