Use default btn styling for Housekeeping button on projects settings page

app/views/projects/edit.html.haml

@@ -145,7 +145,7 @@
           such as compressing file revisions and removing unreachable objects.
     .col-lg-9
       = link_to 'Housekeeping', housekeeping_namespace_project_path(@project.namespace, @project),
-          method: :post, class: "btn btn-save"
+          method: :post, class: "btn btn-default"
   %hr
   .row.prepend-top-default
     .col-lg-3

changelogs/unreleased/25324-change-housekeeping-btn-to-default.yml

+---
+title: Changed Housekeeping button on project settings page to default styling
+merge_request: 
+author: Ryan Harris