fix(examples/cli): correct template path in open-page example (#1401)

Author: elrumordelaluz

examples/cli/open-page/webpack.config.js

@@ -11,7 +11,7 @@ module.exports = setup({
   plugins: [
     new HtmlWebpackPlugin({
       filename: 'example.html',
-      template: '../../assets/layout.html',
+      template: '../../.assets/layout.html',
       title: 'Open Page / Example'
     })
   ]