Use Sidekiq fake! instead of inline! in specs (#25369)

spec/services/update_account_service_spec.rb

@@ -5,7 +5,7 @@ require 'rails_helper'
 RSpec.describe UpdateAccountService, type: :service do
   subject { described_class.new }
 
-  describe 'switching form locked to unlocked accounts' do
+  describe 'switching form locked to unlocked accounts', :sidekiq_inline do
     let(:account) { Fabricate(:account, locked: true) }
     let(:alice)   { Fabricate(:account) }
     let(:bob)     { Fabricate(:account) }