markdown:
  preset: 'default'
  render:
    html: true
    xhtmlOut: true
    breaks: true
    langPrefix: 'language-'
    linkify: true
    typographer: true
    quotes: '“”‘’'
  plugins:
    - 'markdown-it-footnote'
    - 'markdown-it-ins'
    - 'markdown-it-mark'
    - 'markdown-it-sub'
    - 'markdown-it-sup'
    - name: '@renbaoshuo/markdown-it-katex'
      options:
        skipDelimitersCheck: true

添加之后还是不支持$KaTeX$