(GH-11401) Clarify smart quotes behavior/guidance

[michaeltlombardi]

PR Summary

Prior to this change, the about_Quoting_Rules topic document didn't indicate that PowerShell treats smart/typographic quotation marks as normal/programmer quotation marks, making them subject to the same escaping and quoting behaviors.

This change:

• Adds a note about smart quotation marks and guidance to avoid using them to enclose strings.
• Adds an example of escaping smart quotation marks.
• Fixes AB#309820
• Resolves Note about smart quotes #11401

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.
• Contributor's Guide: I have read the contributors guide.
• Style: This PR adheres to the style guide.

[learn-build-service-prod]

Learn Build status updates of commit f43b29e:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Core/About/about_Quoting_Rules.md	✅Succeeded	View (powershell-5.1)
reference/7.2/Microsoft.PowerShell.Core/About/about_Quoting_Rules.md	✅Succeeded	View (powershell-7.2)
reference/7.4/Microsoft.PowerShell.Core/About/about_Quoting_Rules.md	✅Succeeded	View (powershell-7.4)
reference/7.5/Microsoft.PowerShell.Core/About/about_Quoting_Rules.md	✅Succeeded	View (powershell-7.5)

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel