www: Fix block quotes not rendering links (#2712)

- Fixes a bug where block quotes were not able to properly render URLs
in docs (e.g. Info section at
https://fresh.deno.dev/docs/getting-started/create-a-route)
- Replaces existing JSX docs url with the suggested, up-to-date docs url

<img width="775" alt="image"
src="https://github.com/user-attachments/assets/e2e83456-697b-47d5-b074-66e4f287f17a">

docs/latest/getting-started/create-a-route.md

@@ -52,7 +52,7 @@ The new page will be visible at `http://localhost:8000/about`.
 pages in the _Getting Started_ guide will also explain more features of routes. -->
 
 [concepts-routing]: /docs/concepts/routing
-[jsx]: https://reactjs.org/docs/introducing-jsx.html
+[jsx]:https://react.dev/learn/writing-markup-with-jsx
 [preact]: https://preactjs.com/
 
 <!-- [concepts-routes]: /docs/concepts/routes -->

www/utils/markdown.ts

@@ -113,22 +113,27 @@ class DefaultRenderer extends Marked.Renderer {
     return out;
   }
 
-  override blockquote({ text }: Marked.Tokens.Blockquote): string {
+  override blockquote({ text, tokens }: Marked.Tokens.Blockquote): string {
     const match = text.match(ADMISSION_REG);
+
     if (match) {
       const label: Record<string, string> = {
         tip: "Tip",
         warn: "Warning",
         info: "Info",
       };
+      Marked.walkTokens(tokens, (token) => {
+        if (token.type === "text" && token.text.startsWith(match[0])) {
+          token.text = token.text.slice(match[0].length);
+        }
+      });
       const type = match[1];
-      text = text.slice(match[0].length);
       const icon = `<svg class="icon"><use href="/icons.svg#${type}" /></svg>`;
       return `<blockquote class="admonition ${type}">\n<span class="admonition-header">${icon}${
         label[type]
-      }</span>${Marked.parse(text)}</blockquote>\n`;
+      }</span>${Marked.parser(tokens)}</blockquote>\n`;
     }
-    return `<blockquote>\n${Marked.parse(text)}</blockquote>\n`;
+    return `<blockquote>\n${Marked.parser(tokens)}</blockquote>\n`;
   }
 }