Bump @aws-sdk/client-config-service from 3.620.1 to 3.621.0 (#6044)

Bumps [@aws-sdk/client-config-service](https://github.com/aws/aws-sdk-js-v3/tree/HEAD/clients/client-config-service) from 3.620.1 to 3.621.0.
- [Release notes](https://github.com/aws/aws-sdk-js-v3/releases)
- [Changelog](https://github.com/aws/aws-sdk-js-v3/blob/main/clients/client-config-service/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-js-v3/commits/v3.621.0/clients/client-config-service)

---
updated-dependencies:
- dependency-name: "@aws-sdk/client-config-service"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Amndeep Singh Mann <[email protected]>