document emphasis change for Select-string

[TravisEz13]

Issue Details

Document change in PowerShell/PowerShell#8963

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 selecting all version of documents

• The documented feature was introduced in selected version of PowerShell
• This issue only shows up in selected version of the document