Merge pull request #502 from viralpraxis/actualize-performance-sum-cop-reference-uri

Actualize `Performance/Cop` reference URI

Author: koic

config/default.yml

@@ -356,7 +356,7 @@ Performance/StringReplacement:
 Performance/Sum:
   Description: 'Use `sum` instead of a custom array summation.'
   SafeAutoCorrect: false
-  Reference: 'https://blog.bigbinary.com/2016/11/02/ruby-2-4-introduces-enumerable-sum.html'
+  Reference: 'https://www.bigbinary.com/blog/ruby-2-4-introduces-enumerable-sum'
   Enabled: 'pending'
   VersionAdded: '1.8'
   VersionChanged: '1.13'