Merge branch 'zj-update-repository-languages-rails5' into 'master'

Update query simplification

Closes #49873

See merge request gitlab-org/gitlab-ce!20982

app/services/projects/detect_repository_languages_service.rb

@@ -13,10 +13,9 @@ module Projects
 
         detection.updates.each do |update|
           RepositoryLanguage
-            .arel_table.update_manager
             .where(project_id: project.id)
             .where(programming_language_id: update[:programming_language_id])
-            .set(share: update[:share])
+            .update_all(share: update[:share])
         end
 
         Gitlab::Database.bulk_insert(