chore(action-scripts): update dependency aws-sdk-core to '~> 3.257'

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
aws-sdk-core (source, changelog)	'~> 3.256' → '~> 3.257'

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Release Notes

aws/aws-sdk-ruby (aws-sdk-core)

v3.257.0

• Feature - Updated Aws::STS::Client with the latest API changes.

• Feature - Increases the maximum session token size to 4,096 bytes and removes the packed policy size limit. Adds SessionTokenSize and SessionTokenUtilization fields and a new MinimumSessionTokenSize parameter. PackedPolicySize is deprecated.

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