update CHANGELOG.md.

CHANGELOG.md

@@ -4,7 +4,9 @@
 - [Optimize: remove discovery module useless code](https://github.com/Tencent/spring-cloud-tencent/pull/596)
 - [Optimize: optimize configuration conditional & optimize config data tips"](https://github.com/Tencent/spring-cloud-tencent/pull/604)
 - [Optimize: Maybe remove Chinese characters](https://github.com/Tencent/spring-cloud-tencent/pull/608)
+- [Optimize: InstanceId of PolarisRegistration and PolarisServiceRegistry](https://github.com/Tencent/spring-cloud-tencent/pull/611)
 - [Bugfix: fix feign report call result error when using feign direct call](https://github.com/Tencent/spring-cloud-tencent/pull/622)
+- [remove useless code for router](https://github.com/Tencent/spring-cloud-tencent/pull/625)
 - [Feature: support spring-retry router](https://github.com/Tencent/spring-cloud-tencent/pull/633)
 - [Bugfix: fix throw npe when router context is null](https://github.com/Tencent/spring-cloud-tencent/pull/634)
 - [feat:Transfer http headers specified by environment variables](https://github.com/Tencent/spring-cloud-tencent/pull/637)