Add changelog

Author: RanVaknin

.changes/next-release/feature-AWSSDKforJavav2-2e7c0a3.json

@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "AWS SDK for Java v2",
+    "contributor": "",
+    "description": "Adding a small utility class to store data on thread local that can be used across components."
+}