Added Grid link (Best Practices With CSS Grid Layout)

Author: IgnaciodeNuevo

README.md

@@ -39,6 +39,7 @@
 * [An introduction to the CSS Layout Module](https://www.sitepoint.com/introduction-css-grid-layout-module/)
 * [An Introduction to the fr CSS unit](https://css-tricks.com/introduction-fr-css-unit/) - Robin Rendle explains of the fr CSS unit works
 * [Basic grid layout with fallbacks using feature queries](https://www.chenhuijing.com/blog/basic-grid-with-fallbacks/#🏀)
+* [Best Practices With CSS Grid Layout](https://www.smashingmagazine.com/2018/04/best-practices-grid-layout/)
 * [Bootstrap to CSS Grid](https://medium.com/@tallys/bootstrap-to-css-grid-87b3f5f830e4) - Natalya explains how you can start using CSS Grid alongside Bootstrap
 * [Breaking Down a CSS Grid Layout](http://csskarma.com/blog/css-grid-layout/)
 * [Breaking out with CSS Grid explained](https://www.rachelandrew.co.uk/archives/2017/06/01/breaking-out-with-css-grid-explained/)