AWS Network Manager Update: Add support for NetworkManager Dualstack endpoints.

Author: AWS

.changes/next-release/feature-AWSNetworkManager-4f23969.json

@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "AWS Network Manager",
+    "contributor": "",
+    "description": "Add support for NetworkManager Dualstack endpoints."
+}