Update delayed_job version check

The latest delayed_job version (4.1.13) does not contain any code
changes, but only metadata changes to support Rails 8.

Author: philippthun

spec/unit/lib/delayed_job/delayed_job_spec.rb

@@ -1,7 +1,7 @@
 RSpec.describe 'delayed_job' do
   describe 'version' do
     it 'is not updated' do
-      expect(Gem.loaded_specs['delayed_job'].version).to eq('4.1.12'),
+      expect(Gem.loaded_specs['delayed_job'].version).to eq('4.1.13'),
                                                          'revisit monkey patch in lib/delayed_job/quit_trap.rb + review the changes related to lib/delayed_job/threaded_worker.rb'
     end
   end