add v0.3.0 change log

Signed-off-by: mingzhou.swx <mingzhou.swx@alibaba-inc.com>

CHANGELOG.md

@@ -1,15 +1,31 @@
 # Change Log
 
+## v0.3.0
+
+### Kruise-Rollout-Controller
+#### New Features:
+- Support rolling update deployment in batches without extra canary deployment.
+- Support A/B Testing traffic routing.
+- Support various types of traffic routing via adding Lua scripts in a pluggable way.
+- Support [Higress](https://higress.io/en-us/) traffic routing.
+- Support failure toleration threshold for rollout.
+- Support multi-architectures, such as x86 and arm.
+#### Optimization:
+- Optimize rollout/batchRelease controller implementation.
+- Allow users define the number of goroutines of controller.
+- Add `UserAgent = kruise-rollout` for kruise-rollout operator.
+- Define `rollout-id` in workload instead of rollout to avoid race bug.
+
 ## v0.2.0
 ### Kruise-Rollout-Controller
-- Rollout Support StatefulSet & Advanced StatefulSet
-- Support patch batch-id label to pods during Rollout
-- Support the Gateway API for the canary release
+- Rollout Support StatefulSet & Advanced StatefulSet.
+- Support patch batch-id label to pods during Rollout.
+- Support the Gateway API for the canary release.
 
 ## v0.1.0
 ### Kruise-Rollout-Controller
-- Support Canary Publishing + Nginx Ingress + Workload(CloneSet, Deployment)
-- Support for Batch Release(e.g. 20%, 40%, 60%, 80, 100%) for workload(CloneSet)
+- Support Canary Publishing + Nginx Ingress + Workload(CloneSet, Deployment).
+- Support for Batch Release(e.g. 20%, 40%, 60%, 80, 100%) for workload(CloneSet).
 
 ### Documents
 - Introduction, Installation, Basic Usage