Update CDN files for docsify-katex and add support for KaTeX renderin…

…g in the documentation.

- Update the script tag for docsify-katex to use the latest version.
- Add script tags for katex.min.js and marked@4.
- Add a link tag for katex.min.css.
- Comment out unnecessary script and link tags.
- Include a comment with an alternative CDN source for docsify-katex.

docs/index.html

@@ -56,9 +56,17 @@
   <!-- Docsify v4 -->
   <script src="//cdn.jsdelivr.net/npm/docsify@4"></script>
   <!-- CDN files for docsify-katex -->
+  <!-- <script src="//cdn.jsdelivr.net/npm/docsify-katex@latest/dist/docsify-katex.js"></script> -->
+  <!-- <script src="//cdn.jsdelivr.net/npm/docsify-katex@latest/dist/docsify-katex.min.js"></script> -->
+  <script src="//cdn.jsdelivr.net/npm/katex@latest/dist/katex.min.js"></script>
+  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/katex@latest/dist/katex.min.css" />
+  <script src="//cdn.jsdelivr.net/npm/marked@4"></script>
   <script src="//cdn.jsdelivr.net/npm/docsify-katex@latest/dist/docsify-katex.js"></script>
+  <!-- CDN files for docsify-katex -->
+
+<!-- or <script src="//cdn.jsdelivr.net/gh/upupming/docsify-katex@latest/dist/docsify-katex.js"></script> -->
   <!-- or <script src="//cdn.jsdelivr.net/gh/upupming/docsify-katex@latest/dist/docsify-katex.js"></script> -->
-  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/katex@latest/dist/katex.min.css"/>
+  <!-- <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/katex@latest/dist/katex.min.css"/> -->
   <!-- 添加 上一頁 下一頁 -->
   <script src="//cdn.jsdelivr.net/npm/docsify-pagination/dist/docsify-pagination.min.js"></script>
   <!-- 添加 搜尋 -->