[WebPubSub] Prepare beta.3 release. (Azure#26184)

Author: JialinXin

sdk/webpubsub/Microsoft.Azure.WebPubSub.AspNetCore/CHANGELOG.md

@@ -1,18 +1,15 @@
 # Release History
 
-## 1.0.0-beta.3 (Unreleased)
+## 1.0.0-beta.3 (2022-01-06)
 
 ### Features Added
 
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
+- Integrate with rest client to inject `WebPubSubServiceClient<TWebPubSubHub>` in hub methods.
 
 ## 1.0.0-beta.2 (2021-11-24)
 
 ### Features Added
+
 - Add a `ConnectionStates` dictionary to `UserEventResponse` and `ConnectEventResponse` to manage connection state.
 
 ## 1.0.0-beta.1 (2021-11-09)