v2.18.18: Bump amazon/aws-cli from 2.18.17 to 2.18.18 in /aws-cli (#494)

Bumps amazon/aws-cli from 2.18.17 to 2.18.18.

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

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