some autolinks not parsed correctly

[matloob]

goldmark has https://github.com/yuin/goldmark/discussions in github. You should post only issues here. Feature requests and questions should be posted at discussions.

Please answer the following before submitting your issue:

1. What version of goldmark are you using? : 1.6.0

2. What version of Go are you using? : 1.21.4

3. What operating system and processor architecture are you using? : darwin/amd64

4. What did you do? : I ran the following program: https://go.dev/play/p/HQkNuzgNdrt

5. What did you expect to see? :

   goldmark:
   <h2>heading</h2>
   <h4>subheading</h4>
   <p>中文：<a href="https://web.site">https://web.site</a></p>

6. What did you see instead? :

   goldmark:
   <h2>heading</h2>
   <h4>subheading</h4>
   <p>中文：https://web.site</p>

7. Did you confirm your output is different from CommonMark online demo or other official renderer correspond with an extension?:

yes see below

heading

subheading

中文：https://web.site

[yuin]

Works as expected. For CommonMark parsers, An official spec is more important than implementations.

Official Github flavored markdown spec defines AutoLink as follows:

All such recognized autolinks can only come at the beginning of a line, after whitespace, or any of the delimiting characters *, _, ~, and (.

https://github.github.com/gfm/#autolinks-extension-