spec: Support ruby 3.1 and 3.3 error message formats

This message is different for ruby 3.3 and 3.1

Change phrase to be the common factor for both ruby versions

spec/models/mixins/process_tasks_mixin_spec.rb

@@ -257,12 +257,12 @@ def test_method
           expect(api_collection).to receive(:find).with(0).and_return(Struct.new(:id).new(0))
           expect(api_collection).to receive(:find).with(1).and_return(double("Something that responds", :id => 0, :the_task => nil))
 
-          expect($log).to receive(:error).with(a_string_including("undefined method `the_task' for #<struct id=0>")).and_call_original
+          expect($log).to receive(:error).with(a_string_matching(/undefined method `the_task' for/)).and_call_original
           expect(test_class.invoke_api_tasks(api_connection, :ids => [0, 1], :task => "the_task")).to eq([0, 1])
         end
 
         it "collection" do
-          expect($log).to receive(:error).with(a_string_including("undefined method `the_task' for []:Array")).and_call_original
+          expect($log).to receive(:error).with(a_string_matching(/undefined method `the_task' for/)).and_call_original
           expect { test_class.invoke_api_tasks(api_connection, :task => "the_task") }.not_to raise_error
         end
       end