adds link to about_scopes

[chasewilson]

PR Summary

Adds link to about_Scopes to expand on the Using scope modifier

PR Context

Fixes #5068
Fixes AB#1696312

Select the type(s) of documents being changed.

Cmdlet reference & about_ topics

• Version 7.x preview content
• Version 7.0 content
• Version 6 content
• Version 5.1 content

Conceptual articles

• Fundamental conceptual articles
• Script sample articles
• DSC articles
• Gallery articles
• JEA articles
• WMF articles
• SDK articles

PR Checklist

• I have read the contributors guide and followed the style and process guidelines
• PR has a meaningful title
• PR is targeted at the staging branch
• All relevant versions updated
• Includes content related to issues and PRs - see Closing issues using keywords.
• This PR is ready to merge and is not Work in Progress
  • If the PR is work in progress, please add the prefix WIP: or [ WIP ] to the beginning of the
    title and remove the prefix when the PR is ready.

[opbld33]

Docs Build status updates of commit 64797ef:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Core/About/about_Remote_Variables.md	⚠️Warning	View (powershell-5.1)	Details
reference/6/Microsoft.PowerShell.Core/About/about_Remote_Variables.md	⚠️Warning	View (powershell-6)	Details
reference/7.0/Microsoft.PowerShell.Core/About/about_Remote_Variables.md	⚠️Warning	View (powershell-7)	Details
reference/7.1/Microsoft.PowerShell.Core/About/about_Remote_Variables.md	⚠️Warning	View (powershell-7.x)	Details

reference/5.1/Microsoft.PowerShell.Core/About/about_Remote_Variables.md

• [Warning] Metadata with following name(s) are not allowed to be set in Yaml header, or as file level metadata in docfx.json, or as global metadata in docfx.json: locale. They are generated by Docs platform, so the values set in these 3 places will be ignored. Please remove them from all 3 places to resolve the warning.

reference/6/Microsoft.PowerShell.Core/About/about_Remote_Variables.md

• [Warning] Metadata with following name(s) are not allowed to be set in Yaml header, or as file level metadata in docfx.json, or as global metadata in docfx.json: locale. They are generated by Docs platform, so the values set in these 3 places will be ignored. Please remove them from all 3 places to resolve the warning.

reference/7.0/Microsoft.PowerShell.Core/About/about_Remote_Variables.md

• [Warning] Metadata with following name(s) are not allowed to be set in Yaml header, or as file level metadata in docfx.json, or as global metadata in docfx.json: locale. They are generated by Docs platform, so the values set in these 3 places will be ignored. Please remove them from all 3 places to resolve the warning.

reference/7.1/Microsoft.PowerShell.Core/About/about_Remote_Variables.md

• [Warning] Metadata with following name(s) are not allowed to be set in Yaml header, or as file level metadata in docfx.json, or as global metadata in docfx.json: locale. They are generated by Docs platform, so the values set in these 3 places will be ignored. Please remove them from all 3 places to resolve the warning.

For more details, please refer to the build report.

Note: If you changed an existing file name or deleted a file, broken links in other files to the deleted or renamed file are listed only in the full build report.