The preview picture of the example is incorrect

🐛 bug report

Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project
  adheres to.
• I have searched the issue tracker for an issue that matches the one I want
  to file, without success.

Description of the problem

I would like to update my codesandbox example preview to the actual one.

https://codesandbox.io/u/DHTMLX
https://codesandbox.io/s/dhtmlx-spreadhseet-with-react-5ckycm

Could you please advise me on how to replace the image with the current one?
If that's not feasible, may I upload my own image?

(I had hoped that the image would be updated to the current one over time, but it's been a week, and it's still the old one.)

How has this issue affected you? What are you trying to accomplish?

I would like to see the current preview image of the example. As a backup plan, I would appreciate the option to replace the image with my own.

Your Environment

Start with the linked CodeSandbox profile and the “dhtmlx spreadsheet with react” example, then trace how its preview image is supplied. Done means the example displays the current preview image or the supported replacement path is documented; the issue names no repository file or test.