fix rubocop issues

Gemfile

@@ -69,8 +69,8 @@ end
 group :test do
   gem 'simplecov', require: false
   gem 'webmock'
-  gem 'rspec-sidekiq'
   gem 'faker'
+  gem 'rspec-sidekiq'
 end
 
 group :development do

app/models/follow.rb

@@ -4,7 +4,7 @@ class Follow < ApplicationRecord
   include Paginable
 
   belongs_to :account, counter_cache: :following_count, required: true
-  
+
   belongs_to :target_account,
              class_name: 'Account',
              counter_cache: :followers_count,