UNIC -> UNC (dotnet#7181)

I think this was just a typo.

Author: rainersigwald

xml/System.IO/Path.xml

@@ -2291,7 +2291,7 @@ This method handles paths that use the alternate directory separator. It's a fre
  
 ## Remarks  
 
-A **rooted path** is file path that is fixed to a specific drive or UNIC path; it contrasts with a path that is relative to the current drive or working directory. For example, on Windows systems, a rooted path begins with a backslash (for example, "\\Documents") or a drive letter and colon (for example, "C:Documents"). 
+A **rooted path** is file path that is fixed to a specific drive or UNC path; it contrasts with a path that is relative to the current drive or working directory. For example, on Windows systems, a rooted path begins with a backslash (for example, "\\Documents") or a drive letter and colon (for example, "C:Documents"). 
 
 Note that rooted paths can be either absolute (that is, fully qualified) or relative. An absolute rooted path is a fully qualified path from the root of a drive to a specific directory. A relative rooted path specifies a drive, but its fully qualified path is resolved against the current directory. The following example illustrates the difference.