use pwsh -c, not powershell -Command

Author: scivision

+stdlib/+sys/device.m

@@ -1,9 +1,9 @@
 function i = device(p)
 
-i = [];
+i = 0;
 
 if ispc()
-  c0 = 'powershell -Command "(Get-CimInstance -ClassName Win32_Volume -Filter \"DriveLetter = ''';
+  c0 = 'pwsh -c "(Get-CimInstance -ClassName Win32_Volume -Filter \"DriveLetter = ''';
   c1 = stdlib.root_name(stdlib.absolute(p));
   c2 = '''\").SerialNumber"';
   cmd = strcat(c0, c1, c2);