[github] How to draw checkbox or tick mark in GitHub Markdown table?

I used ☐ (☐) for [ ] and ☑ (☑) for [x] and it works for marked.js which says it is compatible with Github markdown. I based my solution on answers for this question. See also this informative answer.

Update: I should have mentioned that when you do it this way, you do not need the <ul>, e.g:

| Unchecked | Checked |
| --------- | ------- |
| &#9744;   | &#9745; |