Backslashes are not correctly shown

### Type of issue

Other (describe below)

### Description

The documentation shows an invalid UNC path

`"\ComputerName\SharedFolder" (Windows: a UNC path).`

On the other hand the XML looks good.
` "\\\\ComputerName\\SharedFolder" (Windows: a UNC path).`

Probably some escaping issues? Probably an esay fix but I don't know how :).

### Page URL

https://learn.microsoft.com/en-us/dotnet/api/system.io.path.getpathroot?view=net-8.0

### Content source URL

https://github.com/dotnet/dotnet-api-docs/blob/main/xml/System.IO/Path.xml

### Document Version Independent Id

d5479c65-09ad-ee9e-1581-528f4baa95d4

### Article author

@dotnet-bot