update markdown configuration docs

src/pages/docs/reference/configuration.md

@@ -24,7 +24,6 @@ export default {
   layoutsDirectory: "layouts", // e.g. ./src/layouts
   markdown: {
     plugins: [],
-    settings: {},
   },
   optimization: "default",
   pagesDirectory: "pages", // e.g. ./src/pages
@@ -146,15 +145,14 @@ export default {
 
 ## Markdown
 
-You can install and provide custom **unifiedjs** [presets](https://github.com/unifiedjs/unified#preset) and [plugins](https://github.com/unifiedjs/unified#plugin) to further customize and process [your markdown](/docs/resources/markdown/) past what Greenwood does by default.
+You can install [**remark**](https://remark.js.org/) or [**rehype**](https://github.com/rehypejs/rehype) compatible plugins to extend Greenwood's markdown rendering and transformation capabilities by passing them as an array to the `markdown` setting.
 
-For plugins, after installing their packages, you can provide their names to Greenwood:
+After installing the package, pass the plugin name as a string:
 
 ```js
 export default {
   markdown: {
-    settings: { commonmark: true },
-    plugins: ["rehype-slug", "rehype-autolink-headings"],
+    plugins: ["rehype-slug", "remark-gfm"],
   },
 };
 ```

src/pages/docs/resources/markdown.md

@@ -10,17 +10,14 @@ In this section we'll cover some of the Markdown related feature of **Greenwood*
 
 ## Plugins
 
-Using your _greenwood.config.js_ you can have additional [markdown customizations and configurations](/docs/reference/configuration/#markdown) using unified presets and plugins.
+Using your _greenwood.config.js_ you can have additional [markdown customizations and configurations](/docs/reference/configuration/#markdown).
 
 For example, to use the [**remark-github**](https://github.com/remarkjs/remark-github) plugin:
 
 ```js
 // npm i -D remark-github
 export default {
   markdown: {
-    settings: {
-      /* whatever you need */
-    },
     plugins: ["remark-github"],
   },
 };