Fix import of vanillaStyles in vanilla examples

Author: 1903Daniel

packages/vanilla/example/index.ts

@@ -1,6 +1,6 @@
 import { createExampleSelection } from '../../examples/src/register';
 import { createThemeSelection } from './theme.switcher';
-import { vanillaStyles } from '../src/helpers';
+import { vanillaStyles } from '../src/util';
 
 window.onload = () => {
   createExampleSelection({styles: vanillaStyles});