Adds cancel btn to new pages domain page

app/views/projects/pages_domains/new.html.haml

@@ -8,3 +8,5 @@
     = render 'form', { f: f }
     .form-actions
       = f.submit 'Create New Domain', class: "btn btn-save"
+      .pull-right
+        = link_to _('Cancel'), project_pages_path(@project), class: 'btn btn-cancel'

changelogs/unreleased/27210-add-cancel-btn-to-new-page-domain.yml

+---
+title: Adds cancel btn to new pages domain page
+merge_request: 18026
+author: Jacopo Beschi @jacopo-beschi
+type: added