fix: taos shell prompt for websocket (#18826)

tools/shell/src/shellWebsocket.c

@@ -223,7 +223,7 @@ void shellRunSingleCommandWebsocketImp(char *command) {
       if (code == TSDB_CODE_WS_SEND_TIMEOUT || code == TSDB_CODE_WS_RECV_TIMEOUT) {
         fprintf(stderr, "Hint: use -t to increase the timeout in seconds\n");
       } else if (code == TSDB_CODE_WS_INTERNAL_ERRO || code == TSDB_CODE_WS_CLOSED) {
-        fprintf(stderr, "TDengine server is down, will try to reconnect\n");
+        fprintf(stderr, "TDengine server is disconnected, will try to reconnect\n");
         shell.ws_conn = NULL;
       }
       ws_free_result(res);