CHANGELOG.md in aws-sdk-ec2-1.252.0 vs CHANGELOG.md in aws-sdk-ec2-1.253.0

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 Unreleased Changes
 ------------------
 
+1.253.0 (2021-07-29)
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+
+* Feature - This release adds support for G4ad xlarge and 2xlarge instances powered by AMD Radeon Pro V520 GPUs and AMD 2nd Generation EPYC processors
+
 1.252.0 (2021-07-28)
 ------------------
 
 * Feature - Code Generated Changes, see `./build_tools` or `aws-sdk-core`'s CHANGELOG.md for details.
 
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