Add changelog

Signed-off-by: Andre Kurait <[email protected]>

Author: AndreKurait

.changes/next-release/feature-S3TransferManager-ca5314b.json

@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "S3 Transfer Manager",
+    "contributor": "AndreKurait",
+    "description": "Extend [#5031](https://github.com/aws/aws-sdk-java-v2/pull/5031) by allowing user configuration of directoryTransferMaxConcurrency during construction of S3TransferManager. This allows for more control of upper limits on JVM Heap memory allocation. See [#6330](https://github.com/aws/aws-sdk-java-v2/issues/6330)"
+}