Updated markdownOptions config type (#2826)

* Updated markdownOptions config type

* removed rehype-toc

packages/astro/src/@types/astro.ts

@@ -166,24 +166,32 @@ export interface AstroUserConfig {
    * Configure how markdown files (`.md`) are rendered.
    *
    * ```js
-	 * {
+   * import { defineConfig } from "astro/config";
+   * import astroRemark from "@astrojs/markdown-remark";
+   * import customRehypePlugin from "/path/to/rehypePlugin.mjs";
+   *
+   * export default defineConfig({
+   *   // Enable Custom Markdown options, plugins, etc.
    *   markdownOptions: {
+   *     render: [
+   *       // The Remark parser to parse Markdown content
+   *       astroRemark,
+   *       {
    *         // Add a Remark plugin to your project.
-	 *     remarkPlugins: [
+   *         remarkPlugins: ["remark-code-titles"],
-	 *       ['remark-autolink-headings', { behavior: 'prepend'}],
+   *
-	 *     ],
    *         // Add a Rehype plugin to your project.
    *         rehypePlugins: [
-	 *       'rehype-slug',
+   *           "rehype-slug",
-	 *       ['rehype-autolink-headings', { behavior: 'prepend'}],
+   *           [customRehypePlugin, { configKey: "value" }],
+   *           ["rehype-autolink-headings", { behavior: "prepend" }],
    *         ],
-	 *     // Customize syntax highlighting
-	 * 	   syntaxHighlight: 'shiki',
    *       },
-	 * }
+   *     ],
+   *   },
+   * });
    * ```
    */
-	/** Options for rendering markdown content */
 	markdownOptions?: {
 		render?: MarkdownRenderOptions;
 	};