Update tutorial-federation.md

Fixed typo

Author: James-Hamil-MSFT

articles/active-directory/hybrid/tutorial-federation.md

@@ -136,7 +136,7 @@ Now that we have the VM created and it has been renamed and has a static IP addr
 $DatabasePath = "c:\windows\NTDS"
 $DomainMode = "WinThreshold"
 $DomainName = "contoso.com"
-$DomaninNetBIOSName = "CONTOSO"
+$DomainNetBIOSName = "CONTOSO"
 $ForestMode = "WinThreshold"
 $LogPath = "c:\windows\NTDS"
 $SysVolPath = "c:\windows\SYSVOL"