Checkbox in array not shown correctly

[bNobo]

Hi @shd101wyy, thank you for your great Markdown extension for VSCode.

I've noticed that when putting a checkbox into an array, it is not rendered as a checkbox:

| Column |
| --- |
| - [x] check |

When removing the first "|" then the checkbox is rendered but "-" last still:

Column |
--- |
- [x] check |