Nested lists inside a column are not nested in HTML

**Operating System**: `Windows`

**DocFX Version Used**: 2.59.3.0

**Template used**: custom template

**Steps to Reproduce**:

1. Create a column structure, add a nested list within the column
```md
:::row:::
:::column:::

- Here is text in a bullet point
- Here is text in a bullet point that should be nested

:::column-end:::
:::column:::

Another column

:::column-end:::
:::row-end:::
```
3. Run docfx build
4. Check HTML

**Additional note**: The same list, not in a column would build properly in HTML

**Expected Behavior**: The list should be nested (as per example HTML below)

```html

```

**Actual Behavior**: The list is not nested (as per HTML example below)

```html

```