docs: update window-open.md to include target (electron#39162)

Update window-open.md to include target

docs/api/window-open.md

@@ -59,7 +59,7 @@ window.open('https://github.com', '_blank', 'top=500,left=200,frame=false,nodeIn
 * Non-standard features (that are not handled by Chromium or Electron) given in
   `features` will be passed to any registered `webContents`'s
   `did-create-window` event handler in the `options` argument.
-* `frameName` follows the specification of `windowName` located in the [native documentation](https://developer.mozilla.org/en-US/docs/Web/API/Window/open#parameters).
+* `frameName` follows the specification of `target` located in the [native documentation](https://developer.mozilla.org/en-US/docs/Web/API/Window/open#parameters).
 * When opening `about:blank`, the child window's [`WebPreferences`](structures/web-preferences.md) will be copied
   from the parent window, and there is no way to override it because Chromium
   skips browser side navigation in this case.