Merge pull request #515 from noahlitvin/patch-1

fix: import in custom theme code snippet

Author: codebender828

website/pages/extending-theme.mdx

@@ -49,7 +49,7 @@ In your `main.js` file, you can then add your custom theme object by passing it
 </c-alert>
 
 ```js
-import Chakra from '@chakra-ui/vue'
+import Chakra, { CThemeProvider } from '@chakra-ui/vue'
 import customTheme from 'custom-theme.js'
 
 Vue.use(Chakra, {