Doesn't highlight correctly bash/shell code

[ashlinchak]

When using a code block with specifying console type, the extension doesn't highlight it correctly:

```console
$ cp .env.example .env
```

Produces the next preview:

This is how it's parsed with the shell code block mark:

```shell
$ cp .env.example .env
```

Reproducible environment: VS Code 1.52.1, Ubuntu 20.04

[zoulja]

+1 Default renderer provides better results for console type