LaTeX equations break rendering

The following markdown is rendered without "-" list item marker.

```markdown
List:
- a list item with $equation$.
```

Actual result:

Expected result:

---
HackMD VSCode extension version: 1.1.2
VSCode version: 1.50.0

Reproduce the provided markdown list with an inline LaTeX equation in the HackMD VSCode extension using the reported versions, then compare the rendered list marker with the expected screenshot. Trace the extension's markdown rendering path and verify that the list marker remains visible alongside the equation.

Scritto dal modello di indicizzazione a partire dal testo della issue.