update doc

Author: qyiming

components/component-docs.json

@@ -5978,7 +5978,7 @@
         "dependencies": []
     },
     "illustration": {
-        "description": "",
+        "description": "An illustration is an image and inline text that work in tandem to communicate a state in a more friendly way.",
         "methods": [],
         "props": {
             "className": {
@@ -6068,7 +6068,7 @@
                     ]
                 },
                 "required": false,
-                "description": "Size of the illustration. _Tested with Mocha testing._",
+                "description": "Size of the illustration. _Tested with snapshot testing._ _Tested with Mocha testing._",
                 "defaultValue": {
                     "value": "'small'",
                     "computed": false

components/illustration/index.jsx

@@ -26,6 +26,9 @@ import Svg from '../utilities/utility-icon/svg';
 // ## Constants
 import { ILLUSTRATION } from '../../utilities/constants';
 
+/**
+ * An illustration is an image and inline text that work in tandem to communicate a state in a more friendly way.
+ */
 const Illustration = ({
 	className,
 	illustration,