Fix false positive spec on PipelineArtifact

spec/factories/ci/pipeline_artifacts.rb

@@ -15,7 +15,7 @@ FactoryBot.define do
     end
 
     trait :with_multibyte_characters do
-      size { { "utf8" => "✓" }.to_json.size }
+      size { { "utf8" => "✓" }.to_json.bytesize }
       after(:build) do |artifact, _evaluator|
         artifact.file = CarrierWaveStringFile.new_file(
           file_content: { "utf8" => "✓" }.to_json,

spec/models/ci/pipeline_artifact_spec.rb

@@ -69,7 +69,7 @@ RSpec.describe Ci::PipelineArtifact, type: :model do
       let(:coverage_report_multibyte) { create(:ci_pipeline_artifact, :with_multibyte_characters) }
 
       it 'sets the size in bytesize' do
-        expect(coverage_report_multibyte.size).to eq(12)
+        expect(coverage_report_multibyte.size).to eq(14)
       end
     end
   end