fix rubocop warning

spec/serializers/analytics_build_entity_spec.rb

@@ -29,7 +29,7 @@ describe AnalyticsBuildEntity do
     end
 
     it 'contains the duration' do
-      expect(subject[:total_time]).to eq({ :hours => 1 })
+      expect(subject[:total_time]).to eq(hours: 1 )
     end
   end
 end