CHANGELOG.md in aws-sdk-ec2-1.402.0 vs CHANGELOG.md in aws-sdk-ec2-1.403.0

@@ -1,7 +1,12 @@
 Unreleased Changes
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+1.403.0 (2023-09-05)
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+
+* Feature - Introducing Amazon EC2 C7gd, M7gd, and R7gd Instances with up to 3.8 TB of local NVMe-based SSD block-level storage. These instances are powered by AWS Graviton3 processors, delivering up to 25% better performance over Graviton2-based instances.
+
 1.402.0 (2023-08-24)
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 * Feature - Amazon EC2 M7a instances, powered by 4th generation AMD EPYC processors, deliver up to 50% higher performance compared to M6a instances. Amazon EC2 Hpc7a instances, powered by 4th Gen AMD EPYC processors, deliver up to 2.5x better performance compared to Amazon EC2 Hpc6a instances.