Update iOS Programming: The Big Nerd Ranch Guide

 vsouza#1348 
[ci skip]

README.md

@@ -2405,7 +2405,7 @@ Most of these are paid services, some have free tiers.
 # Books
 * [The Swift Programming Language by Apple](https://itunes.apple.com/us/book/swift-programming-language/id881256329?mt=11) :large_orange_diamond:
 * [Using Swift with Cocoa and Objective C by Apple](https://itunes.apple.com/us/book/using-swift-cocoa-objective/id888894773?mt=11) :large_orange_diamond:
-* [iOS Programming: The Big Nerd Ranch Guide by Christian Keur, Aaron Hillegass, Joe Conway](https://www.bignerdranch.com/we-write/ios-programming/)
+* [iOS Programming: The Big Nerd Ranch Guide by Christian Keur, Aaron Hillegass, Joe Conway](https://www.bignerdranch.com/books/ios-programming/)
 * [Programming in Objective-C by Stephen G. Kochan](https://www.amazon.com/Programming-Objective-C-6th-Developers-Library/dp/0321967607)
 * [Your First iOS App by Ash Furrow](https://leanpub.com/your-first-ios-app)
 * [The Complete Friday Q & A: Volume 1](https://www.mikeash.com/book.html)