[BUG] Does not handle nested brackets correctly

[CxRes]

Describe the bug
When nesting full reference links in square brackets, the parser incorrectly processes the outer bracket.

Environment

• OS: Windows 10 x64
• VSCode: 1.92.2
• Markdown Preview Enhanced: 0.8.13

To Reproduce
Steps to reproduce the behavior:

1. Type [[foo][bar]]
2. Define [bar]: /url
3. Output is:

   <p><a href="/path/to/file/foo][bar.md">foo][bar</a></p>

Expected behavior

Output should be:

<p>[<a href="/url">foo</a>]</p>