fix: do not double-declare webPreferences (#23223)

lib/browser/guest-window-manager.js

@@ -220,8 +220,8 @@ const canAccessWindow = function (sender, target) {
 // Routed window.open messages with raw options
 ipcMainInternal.on('ELECTRON_GUEST_WINDOW_MANAGER_WINDOW_OPEN', (event, url, frameName, features) => {
   // This should only be allowed for senders that have nativeWindowOpen: false
-  const webPreferences = event.sender.getLastWebPreferences();
-  if (webPreferences.nativeWindowOpen || webPreferences.sandbox) {
+  const lastWebPreferences = event.sender.getLastWebPreferences();
+  if (lastWebPreferences.nativeWindowOpen || lastWebPreferences.sandbox) {
     event.returnValue = null;
     throw new Error('GUEST_WINDOW_MANAGER_WINDOW_OPEN denied: expected native window.open');
   }