[Event Hub] Prepare release (Azure#27665)

Author: deyaaeldeen

sdk/eventhub/event-hubs/CHANGELOG.md

@@ -1,16 +1,10 @@
 # Release History
 
-## 5.11.3 (Unreleased)
-
-### Features Added
-
-### Breaking Changes
+## 5.11.3 (2023-11-07)
 
 ### Bugs Fixed
 - Improve event prefetching to not overload the internal queue.
 
-### Other Changes
-
 ## 5.11.2 (2023-09-25)
 
 ### Bugs Fixed