Application icon

I recently created a simple application to test Rustroid and I really loved the results, however I was trying to change the application icon, and so far I haven't found a way to do it. I know there's an image called rustroid.png in the assets folder, and I thought it was just a matter of changing it but it wasn't that simple, so if someone could guide me I would appreciate it. By the way, the project I created is a notepad with egui template 2021.