Prepare release webpubsub (Azure#29513)

Author: fengzhou-msft

sdk/webpubsub/Azure.ResourceManager.WebPubSub/CHANGELOG.md

@@ -1,14 +1,20 @@
 # Release History
 
-## 1.0.0-beta.5 (Unreleased)
+## 1.0.0-beta.5 (2022-06-28)
+
+### Breaking Changes
+
+- Prepended RP name `WebPubSub` to Private Endpoint related classes.
+- Changed `Location` property/parameter type from `string` to `AzureLocation`.
+- Changed `TenantId` property type from `string` to `Guid`.
 
 ### Features Added
 
-### Breaking Changes
+- Added `Update` methods for Resource classes.
 
 ### Bugs Fixed
 
-### Other Changes
+- Fixed serialization/deserialization bugs of `Tags` and `SystemData` properties for models inherited from ResourceData/TrackedResourceData.
 
 ## 1.0.0-beta.4 (2022-04-08)