add good news on scp on windows 10

scp.md

 # scp
 
-Secure copy (scp) is available on linux and mac. On windows it is available if you followed the instructions for the [Windows Subsystem for Linux](wsl.md). The general syntax of scp (secure copy) is
+Secure copy (scp) is available on linux and mac. On windows it is available on newer Windows 10 installations and if you followed the instructions for the [Windows Subsystem for Linux](wsl.md). The general syntax of scp (secure copy) is
 
 ```
 scp [options] source user@destination