Update webpack.md

Syntax Error CopyWebpackPlugin was CopyWebpack

website/docs/configuration/webpack.md

@@ -46,7 +46,7 @@ An array of Webpack plugins to add: https://webpack.js.org/plugins/
 You can specify whether or not each plugin is appended or prepended to the existing list of Webpack plugins. If not specified, the default is to prepend. Check out the following example:
 
 ```js title="craco.config.js"
-const CopyPlugin = require('copy-webpack-plugin');
+const CopyWebpackPlugin = require('copy-webpack-plugin');
 const ESLintPlugin = require('eslint-webpack-plugin');
 const HtmlPlugin = require('html-webpack-plugin');