Enable the FF ci_new_artifact_file_reader by default

It's enabled on GitLabcom

Changelog: fixed

config/feature_flags/development/ci_new_artifact_file_reader.yml

@@ -5,4 +5,4 @@ rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/273755
 milestone: '13.6'
 type: development
 group: group::pipeline authoring
-default_enabled: false
+default_enabled: true

lib/gitlab/ci/artifact_file_reader.rb

@@ -45,7 +45,7 @@ module Gitlab
       end
 
       def read_zip_file!(file_path)
-        if ::Feature.enabled?(:ci_new_artifact_file_reader, job.project, default_enabled: false)
+        if ::Feature.enabled?(:ci_new_artifact_file_reader, job.project, default_enabled: :yaml)
           read_with_new_artifact_file_reader(file_path)
         else
           read_with_legacy_artifact_file_reader(file_path)