Bump @aws-sdk/signature-v4-multi-region from 3.996.2 to 3.996.3 (#4071)

Bumps [@aws-sdk/signature-v4-multi-region](https://github.com/aws/aws-sdk-js-v3/tree/HEAD/packages/signature-v4-multi-region) from 3.996.2 to 3.996.3.
- [Release notes](https://github.com/aws/aws-sdk-js-v3/releases)
- [Commits](https://github.com/aws/aws-sdk-js-v3/commits/HEAD/packages/signature-v4-multi-region)

---
updated-dependencies:
- dependency-name: "@aws-sdk/signature-v4-multi-region"
  dependency-version: 3.996.3
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]