add changelog

Author: zoewangg

.changes/next-release/bugfix-AWSSDKforJavav2-3872f78.json

@@ -0,0 +1,6 @@
+{
+    "type": "bugfix",
+    "category": "AWS SDK for Java v2",
+    "contributor": "",
+    "description": "Revert credentials reloading change introduced in [#6632](https://github.com/aws/aws-sdk-java-v2/pull/6632) that could cause credentials resolution failure if a shared DefaultCredentialsProvider instance with a profile name configured is used across multiple threads."
+}