Update the homepage URL
Update the homepage URL

https://www.rubocop.org has been "301 Moved Permanently" to https://rubocop.org.
This change reduces network costs.

jmks/rubocop,bbatsov/rubocop,maxjacobson/rubocop,rrosenblum/rubocop,maxjacobson/rubocop,tejasbubane/rubocop,deivid-rodriguez/rubocop,bbatsov/rubocop,deivid-rodriguez/rubocop,maxjacobson/rubocop,deivid-rodriguez/rubocop,tejasbubane/rubocop,jmks/rubocop,tdeo/rubocop,jmks/rubocop,rrosenblum/rubocop,tdeo/rubocop,rrosenblum/rubocop,tdeo/rubocop,tejasbubane/rubocop