Update changelog.txt

hazelcast/src/main/resources/changelog.txt

@@ -4,7 +4,7 @@ Release 3.11
 
 - Added fine-grained control over WAN replication events by Introducing the new event type LOADED and the class EntryLoadedListener.
 - Introduced a license monitor daemon that warns about license expirations and instructs about the next steps.
-- Enhanced the WAN Synchronization by adding Merkle Trees support.
+- Introduced Delta WAN Synchronization which uses Merkle trees.
 - Added ability to set custom TTL for map and cache entries.
 - Added ability to set custom maximum idle timeouts for map entries.
 - Introduced configurable backoff strategy for client reconnections.