docs(configuration): add docs for asyncChunks (webpack#5680)

* feat: add docs for asyncChunks

* chore: suggestion

Co-authored-by: Sam Chen <[email protected]>

Co-authored-by: Sam Chen <[email protected]>

Author: anshumanv

src/content/configuration/entry-context.mdx

@@ -79,6 +79,7 @@ module.exports = {
       filename: 'pages/personal.js',
       dependOn: 'shared',
       chunkLoading: 'jsonp',
+      asyncChunks: true, // Create async chunks that are loaded on demand.
       layer: 'name of layer', // set the layer for an entry point
     },
   },

src/content/configuration/output.mdx

@@ -37,6 +37,24 @@ The top-level `output` key contains a set of options instructing webpack on how
 
 The same as [`output.filename`](#outputfilename) but for [Asset Modules](/guides/asset-modules/).
 
+## output.asyncChunks
+
+`boolean = true`
+
+Create async chunks that are loaded on demand.
+
+**webpack.config.js**
+
+```javascript
+module.exports = {
+  //...
+  output: {
+    //...
+    asyncChunks: true,
+  },
+};
+```
+
 ## output.auxiliaryComment
 
 W> Prefer to use [`output.library.auxiliaryComment`](#outputlibraryauxiliarycomment) instead.