chore: update cra guide

Author: segunadebayo

configs/search-meta.json

@@ -54766,14 +54766,36 @@
       "lvl3": "3. Optional Setup"
     }
   },
+  {
+    "content": "Customizing Theme",
+    "id": "//getting-started/cra-guide",
+    "type": "lvl4",
+    "url": "/getting-started/cra-guide#customizing-theme",
+    "hierarchy": {
+      "lvl1": "Create React App",
+      "lvl2": "3. Optional Setup",
+      "lvl3": null
+    }
+  },
+  {
+    "content": "Using Chakra Icons",
+    "id": "//getting-started/cra-guide",
+    "type": "lvl4",
+    "url": "/getting-started/cra-guide#using-chakra-icons",
+    "hierarchy": {
+      "lvl1": "Create React App",
+      "lvl2": "Customizing Theme",
+      "lvl3": null
+    }
+  },
   {
     "content": "Notes on TypeScript 🚨",
     "id": "//getting-started/cra-guide",
     "type": "lvl4",
     "url": "/getting-started/cra-guide#notes-on-typescript-🚨",
     "hierarchy": {
       "lvl1": "Create React App",
-      "lvl2": "3. Optional Setup",
+      "lvl2": "Using Chakra Icons",
       "lvl3": null
     }
   },

content/getting-started/cra-guide.mdx

@@ -108,7 +108,7 @@ function App() {
 
 ### 3. Optional Setup
 
-- Customizing Theme
+#### Customizing Theme
 
 If you intend to customise the default theme object to match your design
 requirements, you can extend the `theme` from `@chakra-ui/react`.
@@ -145,7 +145,7 @@ function App() {
 > `theme-tools` package includes useful utilities. Install
 > `@chakra-ui/theme-tools`.
 
-- Using Chakra Icons
+#### Using Chakra Icons
 
 Chakra provides a set of commonly used interface icons you can use in your
 project.