remove illegal usage of configure file path

src/kit/taosdemo/taosdemo.c

@@ -176,7 +176,7 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state) {
         fprintf(stderr, "Invalid path %s\n", arg);
         return -1;
       }
-      strcpy(configDir, full_path.we_wordv[0]);
+      taos_options(TSDB_OPTION_CONFIGDIR, full_path.we_wordv[0]);
       wordfree(&full_path);
       break;
     case OPT_ABORT: