This PR fixes to issues with the release:
1. One of the DynamoDB tests was failing due to environment variables
impacting its behavior.
2. The stalled stream protection changelog entries were added in error
via merge conflict.
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_By submitting this pull request, I confirm that you can use, modify,
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Co-authored-by: AWS SDK Rust Bot <aws-sdk-rust-primary@amazon.com>
Fix broken links as a result of repo movement
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This PR fixes issues introduced by moving the repository from
awslabs/smithy-rs to smithy-lang/smithy-rs.
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## Motivation and Context
This PR merges the changelog changes made by the release script from the
`smithy-rs-release-0.55.x` branch.
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_By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice._
Co-authored-by: AWS SDK Rust Bot <aws-sdk-rust-primary@amazon.com>