update code coverage badge

Author: clarkeash

README.md

@@ -6,8 +6,8 @@ Validates an ip address is either public or private. Supports ipv4 & ipv6.
   <a href="https://travis-ci.org/laravel-validation-rules/ip">
     <img src="https://img.shields.io/travis/laravel-validation-rules/ip.svg?style=flat-square">
   </a>
-  <a href="https://codecov.io/gh/laravel-validation-rules/ip">
-    <img src="https://img.shields.io/codecov/c/github/laravel-validation-rules/ip.svg?style=flat-square">
+  <a href="https://scrutinizer-ci.com/g/laravel-validation-rules/ip/code-structure/master/code-coverage">
+    <img src="https://img.shields.io/scrutinizer/coverage/g/laravel-validation-rules/ip.svg?style=flat-square">
   </a>
   <a href="https://scrutinizer-ci.com/g/laravel-validation-rules/ip">
     <img src="https://img.shields.io/scrutinizer/g/laravel-validation-rules/ip.svg?style=flat-square">