The syntax highlighting help links to Changes to syntax highlighting, a locked thread focused on presenting a new feature and not of general interest today. It also links “one of the supported prettify language codes” to Interface options for specifying language prettify, but that post now only says “the prettify
princess language list is now in this other castle”.
The second link should be updated to point to What is syntax highlighting and how does it work?. The first link doesn't really add anything to the text already present on the help page and could be dropped.