Changed the name of two functions to be more consistent

examples/for_each.c

@@ -1,7 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>
-#include "../../src/macro_collections.h"
+#include "../src/macro_collections.h"
 
 // Create containers to use only in this file
 CONTAINER_GENERATE(LIST, PUBLIC, l, list, static, , int)

examples/separate_header_source/main.c

@@ -98,7 +98,7 @@ int main(void)
 
     for (int i = 0; i < 1000; i++)
     {
-        il_insert_if(list, i, list->count, i % 2 == 0);
+        il_push_if(list, i, list->count, i % 2 == 0);
     }
 
     // Print all even numbers