chore(deps): bump @aws-sdk/credential-providers in /cdk

Bumps [@aws-sdk/credential-providers](https://github.com/aws/aws-sdk-js-v3/tree/HEAD/packages/credential-providers) from 3.726.1 to 3.731.1.
- [Release notes](https://github.com/aws/aws-sdk-js-v3/releases)
- [Changelog](https://github.com/aws/aws-sdk-js-v3/blob/main/packages/credential-providers/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-js-v3/commits/v3.731.1/packages/credential-providers)

---
updated-dependencies:
- dependency-name: "@aws-sdk/credential-providers"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>