Update README.md

Learning to make a pull request

Author: NitroNik7

javav2/example_code/sns/README.md

@@ -9,7 +9,7 @@ Shows how to use the AWS SDK for Java 2.x to work with Amazon Simple Notificatio
 
 _Amazon SNS is a web service that enables applications, end-users, and devices to instantly send and receive notifications from the cloud._
 
-## ⚠ Important
+## ⚠ Important 1
 
 * Running this code might result in charges to your AWS account. For more details, see [AWS Pricing](https://aws.amazon.com/pricing/) and [Free Tier](https://aws.amazon.com/free/).
 * Running the tests might result in charges to your AWS account.
@@ -176,4 +176,4 @@ in the `javav2` folder.
 
 Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 
-SPDX-License-Identifier: Apache-2.0
+SPDX-License-Identifier: Apache-2.0