[Bug] The presence of `ol.contains-task-list li.task-list-item input.task-list-item-checkbox`s cause `h4 ul > li`s' `ul`s to be moved to the last entrant.

Similarly to [`issues/1857`](https://github.com/github/markup/issues/1857#issue-2456610906), checkboxed lists that contain CommonMark-adherent child list entries, without checkboxes, render in incorrect places. Consider:

#### This renders.

1. [ ] This renders.

1. [ ] This renders.

1. [ ] This renders.

#### This renders.

- This does not render.

- This does not render.

#### This renders.

1. [ ] This renders.

1. [ ] This renders.

1. [ ] This renders.

#### This renders.

This renders.

The markup of it is:

~~~Markdown
#### This renders.

1. [ ] This renders.

1. [ ] This renders.

1. [ ] This renders.

#### This renders.

- This does not render.

- This does not render.

#### This renders.

1. [ ] This renders.

1. [ ] This renders.

1. [ ] This renders.

#### This renders.

This renders.
~~~

It renders as expected in the previewer:

Previewed | Actual
-|-
|

從 issue 中巢狀的 Markdown 重現開始，比較其預覽渲染結果和實際渲染結果，重點關注核取方塊任務清單以及標題下的子清單。追蹤處理任務清單項目的標記渲染入口點，然後為此範例新增回歸測試。當先前位置錯誤的子清單項目在其原始位置渲染時，即表示完成。

由索引模型根據 Issue 內容生成。