[TD-10823]<fix>: fixed taosdemo memory leak. (#8604)

Co-authored-by: NXiaoyu Wang <xiaoyuwang@taosdata.com>

src/kit/taosdemo/taosdemo.c

@@ -6491,6 +6491,17 @@ static void postFreeResource() {
     tmfree(g_randfloat_buff);
     tmfree(g_rand_current_buff);
     tmfree(g_rand_phase_buff);
+    tmfree(g_randdouble_buff);
+    tmfree(g_randuint_buff);
+    tmfree(g_randutinyint_buff);
+    tmfree(g_randusmallint_buff);
+    tmfree(g_randubigint_buff);
+    tmfree(g_randint);
+    tmfree(g_randuint);
+    tmfree(g_randbigint);
+    tmfree(g_randubigint);
+    tmfree(g_randfloat);
+    tmfree(g_randdouble);
 
     tmfree(g_sampleDataBuf);