better basic example

exercises/my_shot_headless.py

@@ -13,7 +13,7 @@ def main():
         raise RuntimeError("Ten plik uruchom z terminala zwyklym Pythonem, poza edytorem UE.")
     # --render zapewnia film takze wtedy, gdy w my_shot.py jest RENDER=False.
     # Argumenty launchera, np. --editor i --timeout, mozna dopisac w terminalu.
-    script = Path(__file__).with_name("advanced_example.py")
+    script = Path(__file__).with_name("basics.py")
     return run_workshop([str(script), "--render", *sys.argv[1:]])