Update runtime/js/sys.js

Co-authored-by: Jérôme Vouillon <[email protected]>

Author: hhugo

runtime/js/sys.js

@@ -377,7 +377,7 @@ function caml_sys_io_buffer_size(_unit) {
 //Requires: caml_string_of_jsstring
 //Version: >= 5.4
 function caml_sys_temp_dir_name(_unit) {
-  if (os_type === "Win32" && globalThis.os.tmpdir) {
+  if (os_type === "Win32" && require('node:os').tmpdir) {
     return caml_string_of_jsstring(globalThis.os.tmpdir());
   } else {
     return caml_string_of_jsstring("");