fix: create process copy kernel heap

src/multitasking/process.c

@@ -20,7 +20,7 @@ struct pcb *create_process(uint8_t uid)
 		vfree(new_pcb);
 		return NULL;
 	}
-	memcpy(new_pcb->heap, current_pcb->heap, 4096);
+	memcpy(new_pcb->heap, current_pd, 4096);
 
 	new_pcb->next = new_pcb;
 	new_pcb->prev = new_pcb;