Add changelog

Author: dagnir

.changes/next-release/bugfix-DynamoDBEnhancedClient-6fa9afe.json

@@ -0,0 +1,6 @@
+{
+    "type": "bugfix",
+    "category": "DynamoDB Enhanced Client",
+    "contributor": "",
+    "description": "Revert problematic change from [#6349](https://github.com/aws/aws-sdk-java-v2/issues/6349)."
+}