feat: Create portal UI improvements (#5261)

app/javascript/dashboard/api/helpCenter/portals.js

@@ -1,9 +1,14 @@
+/* global axios */
 import ApiClient from '../ApiClient';
 
 class PortalsAPI extends ApiClient {
   constructor() {
     super('portals', { accountScoped: true });
   }
+
+  updatePortal({ portalSlug, params }) {
+    return axios.patch(`${this.url}/${portalSlug}`, params);
+  }
 }
 
 export default PortalsAPI;