chore: Update README to mention DDBECwithSDKV2 examples (#2276)

Author: rishav-karanjit

Examples/runtimes/java/README.md

@@ -4,6 +4,7 @@ This project contains examples demonstrating how to use the AWS Database Encrypt
 
 ```
 ├── ..
+├── DDBECwithSDKV2: Examples for using features in the DynamoDB Encryption Client with AWS SDK for Java 2.x
 ├── DynamoDbEncryption: Examples for using features in the AWS Database Encryption SDK
 └── Migration: Examples for migrating from a plaintext table or the DynamoDB Encryption Client 2.0 to AWS DB ESDK
 ```