Update rubocop to v1.54.1 (#25627)

app/helpers/domain_control_helper.rb

@@ -2,7 +2,7 @@
 
 module DomainControlHelper
   def domain_not_allowed?(uri_or_domain)
-    return if uri_or_domain.blank?
+    return false if uri_or_domain.blank?
 
     domain = if uri_or_domain.include?('://')
                Addressable::URI.parse(uri_or_domain).host

app/lib/connection_pool/shared_connection_pool.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 require 'connection_pool'
-require_relative './shared_timed_stack'
+require_relative 'shared_timed_stack'
 
 class ConnectionPool::SharedConnectionPool < ConnectionPool
   def initialize(options = {}, &block)

app/lib/request_pool.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-require_relative './connection_pool/shared_connection_pool'
+require_relative 'connection_pool/shared_connection_pool'
 
 class RequestPool
   def self.current