v2.21.3: Bump amazon/aws-cli from 2.21.2 to 2.21.3 in /aws-cli (#508)

Bumps amazon/aws-cli from 2.21.2 to 2.21.3.

---
updated-dependencies:
- dependency-name: amazon/aws-cli
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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