Summary

For docsify autoHeader config, there is a separately call to renderer of marked.
Fix the autoHeader's heading marked adaption function and add test case for this.

Related issue, if any:

What kind of change does this PR introduce?

Bugfix

For any code change,

• Related documentation has been updated, if needed
• Related tests have been added or updated, if needed

Does this PR introduce a breaking change?

Yes
No

Tested in the following browsers:

• Chrome
• Firefox
• Safari
• Edge