[ BUG ] ... Unable to generate TOC

[mbhangui]

Describe the bug
I'm unable to generate the TOC after I added the section indimail-mta authentication mechanism. This is the link

To Reproduce
If I remove the entire section listed above, gh-md-toc works

Expected behavior
I was expecting the toc generation to work. Maybe I have some syntax error, but I'm unable to figure it out. Currently I have generated the TOC for that section manually.

Environment (please complete the following information):

• OS: Fedora Core 38
• gh-md-toc 0.6.2 and 0.8.0

Additional context

It is not a big issue and I want to thank you for this software.