send cookies along with keycloak.updateToken()

adapters/oidc/js/src/main/resources/keycloak.js

@@ -380,6 +380,7 @@
                         var req = new XMLHttpRequest();
                         req.open('POST', url, true);
                         req.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
+                        req.withCredentials = true;
 
                         if (kc.clientId && kc.clientSecret) {
                             req.setRequestHeader('Authorization', 'Basic ' + btoa(kc.clientId + ':' + kc.clientSecret));