Update README.md

Just a tiny change to make sure to navigate to the latest version of the Laravel Docs and added an 'a'.

Author: royklutman

README.md

@@ -5,11 +5,11 @@
 Webpack Encore is a simpler way to integrate [Webpack](https://webpack.js.org/) into your
 application. It *wraps* Webpack, giving you a clean & powerful API
 for bundling JavaScript modules, pre-processing CSS & JS and compiling
-and minifying assets. Encore gives you professional asset system
+and minifying assets. Encore gives you a professional asset system
 that's a *delight* to use.
 
 Encore is inspired by [Webpacker](https://github.com/rails/webpacker) and
-[Mix](https://laravel.com/docs/5.6/mix), but stays in the spirit of
+[Mix](https://laravel.com/docs/mix), but stays in the spirit of
 Webpack: using its features, concepts and naming conventions for a familiar
 feel. It aims to solve the most common Webpack use cases.