docs: add frameName note for window.open (#28435)

docs/api/window-open.md

@@ -65,6 +65,7 @@ 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 `additionalFeatures` argument.
+* `frameName` follows the specification of `windowName` located in the [native documentation](https://developer.mozilla.org/en-US/docs/Web/API/Window/open#parameters).
 
 To customize or cancel the creation of the window, you can optionally set an
 override handler with `webContents.setWindowOpenHandler()` from the main