Update changelogs for extensions (Azure#21668)

Author: JoshLove-msft

sdk/eventgrid/Microsoft.Azure.WebJobs.Extensions.EventGrid/CHANGELOG.md

@@ -1,16 +1,14 @@
 # Release History
 
-## 3.0.0-beta.3 (Unreleased)
+## 3.0.0-beta.3 (2021-06-08)
 
+### Key Bug Fixes
+- Fix issue when parsing CloudEvent schema subscription validation request.
 
 ## 3.0.0-beta.2 (2021-05-11)
 
-### Changes
-
-#### New Features
-
+### Added
 - Binding to the `CloudEvent` type is now supported.
 
 ## 3.0.0-beta.1 (2021-03-23)
-
 - The initial release of Microsoft.Azure.WebJobs.Extensions.EventGrid 3.0.0

sdk/servicebus/Microsoft.Azure.WebJobs.Extensions.ServiceBus/CHANGELOG.md

@@ -1,7 +1,13 @@
 # Release History
 
-## 5.0.0-beta.4 (Unreleased)
+## 5.0.0-beta.4 (2021-06-08)
 
+### Added
+- Added `AutoCompleteMessages` property to `ServiceBusTriggerAttribute` which allows configuring autocompletion at the function level.
+
+### Key Bug Fixes
+- Avoid exception that occurred when a function settles messages and `AutoCompleteMessages` is true for multiple dispatch functions.
+- Avoid null reference exception that could occur when no messages are available for a multiple dispatch function.
 
 ## 5.0.0-beta.3 (2021-05-18)