[TD-4136]<fix>: taosdemo max records per req < 32767 (#6118)

Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

src/kit/taosdemo/taosdemo.c

@@ -4661,7 +4661,7 @@ static int64_t generateData(char *recBuf, char **data_type,
       double t = rand_double();
       pstr += sprintf(pstr, ",%20.8f", t);
     } else if (strcasecmp(data_type[i % c], "BOOL") == 0) {
-      bool b = taosRandom() & 1;
+      bool b = rand_bool() & 1;
       pstr += sprintf(pstr, ",%s", b ? "true" : "false");
     } else if (strcasecmp(data_type[i % c], "BINARY") == 0) {
       char *s = malloc(lenOfBinary);