[EH] update changelog (Azure#31499)

* update changelog

* update day

* sket_timeout

* Update sdk/eventhub/azure-eventhub/CHANGELOG.md

Co-authored-by: swathipil <76007337+swathipil@users.noreply.github.com>

---------

Co-authored-by: swathipil <76007337+swathipil@users.noreply.github.com>

Author: l0lawrence

sdk/eventhub/azure-eventhub/CHANGELOG.md

@@ -1,14 +1,14 @@
 # Release History
 
-## 5.11.4 (Unreleased)
+## 5.11.4 (2023-08-08)
 
 ### Features Added
 
-### Breaking Changes
+- A new float keyword argument `socket_timeout` has been added to the sync and async `EventHubConsumerClient` and `EventHubProducerClient`.
 
 ### Bugs Fixed
 
-### Other Changes
+- Fixed bug [#31258](https://github.com/Azure/azure-sdk-for-python/issues/31258) where async `BlobCheckpointStore` was reprocessing old events after an error.
 
 ## 5.11.3 (2023-07-12)