Fixes #7988 - Fix PS5.1 PSModulePath location

[sdwheeler]

PR Summary

Fixes AB#1869583 - Fixes #7988 - Fix PS5.1 PSModulePath location

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[opbld33]

Docs Build status updates of commit 64d4de5:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Core/About/about_PSModulePath.md	✅Succeeded	View (powershell-5.1)
reference/7.0/Microsoft.PowerShell.Core/About/about_PSModulePath.md	✅Succeeded	View (powershell-7)
reference/7.1/Microsoft.PowerShell.Core/About/about_PSModulePath.md	✅Succeeded	View (powershell-7.1)
reference/7.2/Microsoft.PowerShell.Core/About/about_PSModulePath.md	✅Succeeded	View (powershell-7.2)

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

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