Update markdown-content.mdx

[yuedanlabs]

fix Markdown plugins remarkPlugins example code error for remarkToc usage

Description (required)

there is an error for Markdown plugins remarkPlugins example code about remarkToc usage

fix code as bellow:

import { defineConfig } from 'astro/config';
import remarkToc from 'remark-toc';
import { rehypeAccessibleEmojis } from 'rehype-accessible-emojis';

export default defineConfig({
  markdown: {
    // Applied to .md and .mdx files
-   remarkPlugins: [remarkToc, { heading: 'toc', maxDepth: 3 }],
+   remarkPlugins: [ [remarkToc, { heading: 'toc', maxDepth: 3 } ] ],
    rehypePlugins: [rehypeAccessibleEmojis],
  },
});

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First-time contributor to Astro Docs?

yes

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Warnings reference

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[sarah11918]

Thank you so much for catching this! We appreciate you taking the time to come fix this, and are happy to welcome you to Team Docs! 🥳

[yanthomasdev]

LGTM! Good job @yuedanlabs! 💜