Merge branch '285125-reduce-query-on-verify_pipeline_list' into 'master'

Adjust default page size in query when listing pipelines

See merge request gitlab-org/gitlab!48673

app/controllers/projects/pipelines_controller.rb

@@ -39,7 +39,7 @@ class Projects::PipelinesController < Projects::ApplicationController
       .new(project, current_user, index_params)
       .execute
       .page(params[:page])
-      .per(30)
+      .per(20)
 
     @pipelines_count = limited_pipelines_count(project)