Fixes 11605 - Corrected invalid regex

[mikefrobbins]

PR Summary

Fixes AB#358483, Fixes #11605 - Corrected invalid regex

PR Checklist

• Descriptive Title: This PR's title is a synopsis of the changes it proposes.
• Summary: This PR's summary describes the scope and intent of the change.
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• Style: This PR adheres to the style guide.

[learn-build-service-prod]

Learn Build status updates of commit ae32b10:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/docs-conceptual/learn/ps101/05-formatting-aliases-providers-comparison.md	✅Succeeded	View (>=powershell-5.1)

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