Change path of bin/sidkiq-cluster in comments

`sidekiq-cluster` is moved from `bin/` to `ee/bin` in EE code. This
is a corresponding change in CE.

lib/gitlab/sidekiq_config.rb

@@ -7,7 +7,7 @@ module Gitlab
   module SidekiqConfig
     QUEUE_CONFIG_PATHS = %w[app/workers/all_queues.yml ee/app/workers/all_queues.yml].freeze
 
-    # This method is called by `bin/sidekiq-cluster` in EE, which runs outside
+    # This method is called by `ee/bin/sidekiq-cluster` in EE, which runs outside
     # of bundler/Rails context, so we cannot use any gem or Rails methods.
     def self.worker_queues(rails_path = Rails.root.to_s)
       @worker_queues ||= {}
@@ -19,7 +19,7 @@ module Gitlab
       end
     end
 
-    # This method is called by `bin/sidekiq-cluster` in EE, which runs outside
+    # This method is called by `ee/bin/sidekiq-cluster` in EE, which runs outside
     # of bundler/Rails context, so we cannot use any gem or Rails methods.
     def self.expand_queues(queues, all_queues = self.worker_queues)
       return [] if queues.empty?