Enable running pandoc on about topic files

[adityapatwardhan]

Pandoc will be run on about topic files. These files will also be included in the appropriate cab / zip files.

Version(s) of document impacted

• 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