Fix missing MR widget status icons

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/40283

Regressed in
https://gitlab.com/gitlab-org/gitlab-ce/commit/d01d509bd8612f9879fa762de8ea3763bcff81cf

app/assets/javascripts/vue_merge_request_widget/components/mr_widget_status_icon.js

@@ -14,7 +14,7 @@ export default {
     statusObj() {
       return {
         group: this.status,
-        icon: `icon_status_${this.status}`,
+        icon: `status_${this.status}`,
       };
     },
   },