[Bug][Markdown]: the prograph with "<code><pre></code>",the <pre>is not show, It was interpreted as an HTML tag.

### Operating System

windows

### Compiler

QT

### Compiler flags

MSVC2022 64

### maddy version

1.5.0 (latest)

### Minimal Mardown example

AS FOLLOW 

### What is not working? What did you try?

this is john, `<pre>`  he is a very nice guy,this is my markdown code，bug the <pre>is not show, It was interpreted as an HTML tag.