Fixes #4525 - add link to MatchInfo class

[sdwheeler]

Fixes AB#1567940

Version(s) of document impacted

• Impacts 7 document
• Impacts 6 document
• Impacts 5.1 document
• Impacts 5.0 document
• Impacts 4.0 document
• Impacts 3.0 document

Reason(s) for not updating all version of documents

• The documented feature was introduced in version (list version here) of PowerShell
• This issue only shows up in version (list version(s) here) of the document
• This PR partially fixes the issue, and issue # tracks the remaining work

[opbld30]

Docs Build status updates of commit 61f3990:

🕙 Pending: waiting for processors (7 builds ahead of you)

⚠️ Docs Build is busy, currently there are 7 builds ahead of this one, for more information you can view the Build queue graph on the Docs Portal.

[opbld31]

Docs Build status updates of commit 61f3990:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/3.0/Microsoft.PowerShell.Utility/Select-String.md	✅Succeeded	View (powershell-3.0)
reference/4.0/Microsoft.PowerShell.Utility/Select-String.md	✅Succeeded	View (powershell-4.0)
reference/5.0/Microsoft.PowerShell.Utility/Select-String.md	✅Succeeded	View (powershell-5.0)
reference/5.1/Microsoft.PowerShell.Utility/Select-String.md	✅Succeeded	View (powershell-5.1)
reference/6/Microsoft.PowerShell.Utility/Select-String.md	✅Succeeded	View (powershell-6)
reference/7/Microsoft.PowerShell.Utility/Select-String.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.

[bobbytreed]

LGTM