fix: random seed

Author: hozlucas28

libs/singly-list/main.c

@@ -1,5 +1,7 @@
 #include "./main.h"
 
+#include <time.h>
+
 #include "../macros.h"
 
 // Private methods
@@ -150,6 +152,8 @@ void randomSortSList(SList* _list) {
 
     if (length == 1) return;
 
+    srand(time(NULL));
+
     if (length == 2) {
         rndIndex = rand() % length;
         if (rndIndex == index) return;