add change log for 2.6.4

CHANGES.md

@@ -1,6 +1,31 @@
 # Release Notes
 
+## 2.6.4
+
+Enhancements / Features
+
+- Support access Redis with password, [#2146](https://github.com/apache/incubator-dubbo/pull/2146)
+- Support char array for GenericService, [#2137](https://github.com/apache/incubator-dubbo/pull/2137)
+- Direct return when the server goes down abnormally, [#2451](https://github.com/apache/incubator-dubbo/pull/2451)
+- Add log for trouble-shooting when qos start failed, [#2455](https://github.com/apache/incubator-dubbo/pull/2455)
+- PojoUtil support subclasses of java.util.Date, [#2502](https://github.com/apache/incubator-dubbo/pull/2502)
+- Add ip and application name for MonitorService, [#2166](https://github.com/apache/incubator-dubbo/pull/2166)
+- New ASCII logo, [#2402](https://github.com/apache/incubator-dubbo/pull/2402)
+
+Bugfixes
+
+- Change consumer retries default value from 0 to 2, [#2303](https://github.com/apache/incubator-dubbo/pull/2303)
+- Fix the problem that attachment is lost when retry, [#2024](https://github.com/apache/incubator-dubbo/pull/2024)
+- Fix NPE when telnet get a null parameter, [#2453](https://github.com/apache/incubator-dubbo/pull/2453)
+
+UT stability
+
+- Improve the stability by changing different port, setting timeout to 3000ms, [#2501](https://github.com/apache/incubator-dubbo/pull/2501)
+
+Issues and Pull Requests, check [milestone-2.6.4](https://github.com/apache/incubator-dubbo/milestone/19).
+
 ## 2.6.3
+
 Enhancements / Features
 
 - Support implicit delivery of attachments from provider to consumer, #889
@@ -58,4 +83,4 @@ Issues and Pull Requests, check [milestone-2.6.3](https://github.com/apache/incu
    - Waiting for registry notification on consumer side by checking channel state.
 7. Simplify consumer/provider side check in RpcContext, #1444.
 
-Issues and Pull Requests, check [milestone-2.6.2](https://github.com/apache/incubator-dubbo/milestone/15).
+Issues and Pull Requests, check [milestone-2.6.2](https://github.com/apache/incubator-dubbo/milestone/15).