Marked version:
18.0.0
Describe the bug

Very similar to #3816 - still experiencing an invalid group specifier name in Safari 15.

The regex that is produced for blockSkip (I think as I can only test remotely on compiled code) ends up to be:

r = "\\[(?:[^\\[\\]`]|(?<a>`+)[^`]+\\k<a>(?!`))*?\\]\\((?:\\\\[\\s\\S]|[^\\\\\\(\\)]|\\((?:\\\\[\\s\\S]|[^\\\\\\(\\)])*\\))*\\)|(?<!`)()(?<b>`+)[^`]+\\k<b>(?!`)|<(?! )[^<>]*?>"

running the regex in safari 15 new RegExp(r), produces the above error

To Reproduce
as above

Expected behavior
marked works with older version of Safari

Thank you for this lib and the efforts maintaining it !