chore: typo fix in cli README.md

[armmanvaillancourt]

Reason for this change

I was reading the documentation and found a small typo to be fixed.

Description of changes

Fixed the typo

Description of how you validated changes

It's just a README

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[aws-cdk-automation]

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✅ Updated pull request passes all PRLinter validations. Dismissing previous PRLinter review.

[scanlonp]

Good find @armmanvaillancourt! Thanks for the contribution!

Note: for future PRs, make sure your title follows conventional commits (chore: / fix: / feat:, and is all lowercase)!

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: efd1ec6
• Result: SUCCEEDED
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[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).