Fixes #10426 - Update slash character description

[sdwheeler]

PR Summary

Update slash character description

• Fixes AB#160874
• Fixes about_Locations calls backslash slash in two places #10426

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 f85eb3c:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Core/About/about_Locations.md	✅Succeeded	View (powershell-5.1)
reference/5.1/Microsoft.PowerShell.Core/About/about_Path_Syntax.md	✅Succeeded	View (powershell-5.1)
reference/7.2/Microsoft.PowerShell.Core/About/about_Locations.md	✅Succeeded	View (powershell-7.2)
reference/7.2/Microsoft.PowerShell.Core/About/about_Path_Syntax.md	✅Succeeded	View (powershell-7.2)
reference/7.3/Microsoft.PowerShell.Core/About/about_Locations.md	✅Succeeded	View (powershell-7.3)
reference/7.3/Microsoft.PowerShell.Core/About/about_Path_Syntax.md	✅Succeeded	View (powershell-7.3)
reference/7.4/Microsoft.PowerShell.Core/About/about_Locations.md	✅Succeeded	View (powershell-7.4)
reference/7.4/Microsoft.PowerShell.Core/About/about_Path_Syntax.md	✅Succeeded	View (powershell-7.4)

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