[azeventhubs] updated CHANGELOG, prepped release (Azure#24526)

Author: richardpark-msft

sdk/messaging/azeventhubs/CHANGELOG.md

@@ -1,20 +1,16 @@
 # Release History
 
-## 2.0.0-beta.1 (Unreleased)
+## 2.0.0-beta.1 (2025-05-06)
 
 ### Features Added
 
-- Support for Event Hubs Geo-Replication.
+- Support for Event Hubs Geo-Replication (PR#24477)
 
 ### Breaking Changes
 
 - This package is compatible with azeventhubs v1, with one difference - Checkpoint.Offset and ReceivedEventData.Offset's type have been changed to a string (from an integer). 
   This change does NOT affect any stored checkpoints. Most customers will be unaffected by this change and can safely upgrade.
 
-### Bugs Fixed
-
-### Other Changes
-
 ## 1.3.2 (2025-04-08)
 
 ### Bugs Fixed