updated chapter 1 link in readme

Author: sloloris

readme.md

@@ -2,6 +2,6 @@
 My Python-coded solutions to the problems in Cracking the Coding Interview, 6th Edition, by Gayle Laakmann McDowell. 
 
 #### Table of Contents
-* [Chapter 1: Arrays and Strings](../blob/master/chapter-1-arrays-and-strings)
+* [Chapter 1: Arrays and Strings](../tree/master/chapter-1-arrays-and-strings)
 
 Pull requests or alternative solutions are appreciated!