Prepare for June eventhubs release (#5694)

Author: LarryOsterman

sdk/eventhubs/azure-messaging-eventhubs/CHANGELOG.md

@@ -1,17 +1,11 @@
 # Release History
 
-## 1.0.0-beta.9 (Unreleased)
-
-### Features Added
-
-### Breaking Changes
+## 1.0.0-beta.9 (2024-06-11)
 
 ### Bugs Fixed
 
 - Fixed eventhub connection properties to better align with the names used by other Azure SDKs.
 
-### Other Changes
-
 ## 1.0.0-beta.8 (2024-05-07)
 
 ### Features Added