Quote blocks removed from list item / bullet

**Describe the bug**

dprint-plugin-markdown version: x.x.x

**Input Code**

```md
- list item
  - > sub-list item quote
```
- list item
  - > sub-list item quote

**Expected Output**

```md
- list item
  - > sub-list item quote
```
- list item
  - > sub-list item quote

**Actual Output**

```md
- list item
  - sub-list item quote
```
- list item
  - sub-list item quote