Update dependency software.amazon.awssdk:bom to v2.20.157

[renovate[bot]]

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This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
software.amazon.awssdk:bom	2.16.104 -> 2.20.157

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[coveralls]

coverage: 96.332%. remained the same when pulling 9c1139fb0a82309a3c4d7a4e13b147b52b665c97 on renovate/aws-java-sdk-v2-monorepo into 87d6e9e3dae674d8434bfe9bef8666b0429ad8bf on 6.x.