Set sectional_codeowners -> default_enabled: true

changelogs/unreleased/218756-feature-flag-enable-sectional-codeowner.yml

+---
+title: Enable feature flag 'sectional_codeowners' Sections for Code Owners
+merge_request: 36902
+author:
+type: added

ee/lib/gitlab/code_owners/file.rb

@@ -171,7 +171,7 @@ module Gitlab
 
       def sectional_codeowners?
         strong_memoize(:sectional_codeowners_check) do
-          Feature.enabled?(:sectional_codeowners, @project, default_enabled: false)
+          Feature.enabled?(:sectional_codeowners, @project, default_enabled: true)
         end
       end
     end