chore: Enable the new Rubocop rules (#7122)

fixes: https://linear.app/chatwoot/issue/CW-1574/renable-the-disabled-rubocop-rules

spec/builders/campaigns/campaign_conversation_builder_spec.rb

@@ -1,6 +1,6 @@
 require 'rails_helper'
 
-describe ::Campaigns::CampaignConversationBuilder do
+describe Campaigns::CampaignConversationBuilder do
   let(:account) { create(:account) }
   let(:inbox) { create(:inbox, account: account) }
   let(:contact) { create(:contact, account: account, identifier: '123') }