Fixes #5020 - add Get-Counter to v7 docs

[sdwheeler]

PR Summary

Fixes #5020 - add Get-Counter to v7 docs
Fixes AB#1638972
See PowerShell/PowerShell#10933

PR Context

Select the type(s) of documents being changed.

Cmdlet reference & about_ topics

• Version 7 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.

[opbld32]

Docs Build status updates of commit 94331b7:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Diagnostics/Get-Counter.md	✅Succeeded	View (powershell-5.1)
reference/7/Microsoft.PowerShell.Diagnostics/Get-Counter.md	✅Succeeded	View (powershell-7)

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.

[DCtheGeek]

Update the date, otherwise it looks fine. The PowerShell blocks mostly had both the cmd and the output, which you normally separate into two codefences. Your call on leaving it this way or breaking them out.

[opbld33]

Docs Build status updates of commit 87d07ae:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Diagnostics/Get-Counter.md	✅Succeeded	View (powershell-5.1)
reference/7/Microsoft.PowerShell.Diagnostics/Get-Counter.md	✅Succeeded	View (powershell-7)

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.

[opbld30]

Docs Build status updates of commit c128d08:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Diagnostics/Get-Counter.md	✅Succeeded	View (powershell-5.1)
reference/7/Microsoft.PowerShell.Diagnostics/Get-Counter.md	✅Succeeded	View (powershell-7)

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.

[DCtheGeek]

This is approved for when the source PR is merged.

[opbld33]

Docs Build status updates of commit 0997eac:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/5.1/Microsoft.PowerShell.Diagnostics/Get-Counter.md	✅Succeeded	View (powershell-5.1)
reference/7/Microsoft.PowerShell.Diagnostics/Get-Counter.md	✅Succeeded	View (powershell-7)

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.