Update redirected link to O'Reilly book

Author: Xymph

_posts/16-10-01-Books.md

@@ -21,7 +21,7 @@ for modern, secure, and fast cryptography.
 
 * [Build APIs You Won't Hate](https://apisyouwonthate.com/) - Everyone and their dog wants an API,
 so you should probably learn how to build them.
-* [Modern PHP](http://shop.oreilly.com/product/0636920033868.do) - Covers modern PHP features, best practices, testing, tuning, deployment and setting up a dev environment.
+* [Modern PHP](https://www.oreilly.com/library/view/modern-php/9781491905173/) - Covers modern PHP features, best practices, testing, tuning, deployment and setting up a dev environment.
 * [Building Secure PHP Apps](https://leanpub.com/buildingsecurephpapps) - Learn the security basics that a senior
 developer usually acquires over years of experience, all condensed down into one quick and easy handbook
 * [Modernizing Legacy Applications In PHP](https://leanpub.com/mlaphp) - Get your code under control in a series of