chore: add missing breadcrumb

ui/admin/app/controllers/scopes/scope/host-catalogs/host-catalog/host-sets/host-set/hosts/host.js

@@ -1,3 +1,13 @@
 import Controller from '@ember/controller';
 
-export default class ScopesScopeHostCatalogsHostCatalogHostSetsHostSetHostsHostController extends Controller {}
+export default class ScopesScopeHostCatalogsHostCatalogHostSetsHostSetHostsHostController extends Controller {
+  // =attributes
+
+  /**
+   * A role breadcrumb
+   * @type {string}
+   */
+  get breadCrumb() {
+    return this.model.displayName;
+  }
+}