butterflies: finish generation should the last action per generation

src/modules/butterflies/butterflies_actions_setup.c

@@ -72,7 +72,8 @@ void bf_add_actions(struct cats_configuration *conf)
                 bf_add_generation_action(conf, bf_action_stats_gather, "gather stats", generation);
                 bf_add_generation_action(conf, bf_action_dispersal, "dispersal", generation);
                 bf_add_generation_action(conf, bf_action_save_eggs_grid, "output eggs", generation);
-                bf_add_generation_action(conf, bf_action_generation_finish, "finish generation", generation);
                 bf_add_generation_action(conf, bf_action_stats_write, "write stats", generation);
+                bf_add_generation_action(conf, bf_action_generation_finish, "finish generation", generation);
+
         }
 }
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