Fix hook spec

spec/lib/hook_spec.rb

@@ -29,11 +29,11 @@ describe OpenProject::Webhooks::Hook do
     let(:hook) { OpenProject::Webhooks::Hook.new('myhook', &probe) }
 
     before do
-      probe.should_receive(:call).with(hook, 1, 2, 3, 4)
+      probe.should_receive(:call).with(hook, 1, 2, 3)
     end
 
     it 'should execute the callback with the correct parameters' do
-      hook.handle(1, 2, 3, 4)
+      hook.handle(1, 2, 3)
     end
   end
 end