Prepare to Microsoft.Azure.WebJobs.Extensions.EventHubs release (Azure#19219)

Author: pakrym

sdk/eventhub/Microsoft.Azure.WebJobs.Extensions.EventHubs/CHANGELOG.md

@@ -1,7 +1,17 @@
 # Release History
 
-## 5.0.0-beta.2 (Unreleased)
+## 5.0.0-beta.2 (2021-03-09)
 
+### Changes
+
+#### Key Bug Fixes
+
+- Fixed an issue where the `PartitionContext` is not injected correctly.
+- Fixed an issue where variables were not resolved when used in the `ConsumerGroup` attribute property.
+
+#### New Features
+
+- Added support for TokenCredential-based authentication for Azure Storage connection used for checkpointing.
 
 ## 5.0.0-beta.1 (2021-02-09)