increase HTTPD stack size to 6k

components/wifi-manager/wifi_manager_http_server.c

@@ -132,6 +132,7 @@ esp_err_t http_server_start()
     config.max_uri_handlers = 25;
     config.max_open_sockets = 8;
     config.uri_match_fn = httpd_uri_match_wildcard;
+	config.stack_size = 6*1024;
     //todo:  use the endpoint below to configure session token?
     // config.open_fn