CHANGELOG.md in aws-sdk-ec2-1.227.0 vs CHANGELOG.md in aws-sdk-ec2-1.228.0

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 Unreleased Changes
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+1.228.0 (2021-03-19)
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+* Feature - X2gd instances are the next generation of memory-optimized instances powered by AWS-designed, Arm-based AWS Graviton2 processors.
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 1.227.0 (2021-03-10)
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 * Feature - Code Generated Changes, see `./build_tools` or `aws-sdk-core`'s CHANGELOG.md for details.
 
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