Reference value constants from specs (#33479)

spec/requests/api/v1/accounts/notes_spec.rb

@@ -29,7 +29,7 @@ RSpec.describe 'Accounts Notes API' do
     end
 
     context 'when account note exceeds allowed length', :aggregate_failures do
-      let(:comment) { 'a' * 2_001 }
+      let(:comment) { 'a' * AccountNote::COMMENT_SIZE_LIMIT * 2 }
 
       it 'does not create account note' do
         subject