fix: Update article count in portal admin dashboard (#5647)

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

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

@@ -6,6 +6,10 @@ class PortalsAPI extends ApiClient {
     super('portals', { accountScoped: true });
   }
 
+  getPortal({ portalSlug, locale }) {
+    return axios.get(`${this.url}/${portalSlug}?locale=${locale}`);
+  }
+
   updatePortal({ portalSlug, portalObj }) {
     return axios.patch(`${this.url}/${portalSlug}`, portalObj);
   }