[Graphviz Preview] Can not preview Graphviz following a list element

[NeoVerto]

Describe the bug It can not preview graphviz on editing mode when the code block following a list element (whatever the element is ordered or unordered).

To Reproduce Steps to reproduce the behavior:

1. Create a list element

- Here is an unordered list element

2. then create the graphviz block following the element

- Here is an unordered list element

  ```graphviz
  digraph G {
      G
  }

Expected behavior

The preview of graphviz block is supposed to be shown.

Screenshots

Desktop (please complete the following information):

• OS: Windows 11 23H2
• Version 3.17.0 x64 qt5.15.2