add: network to sandboxes.

Author: Felipe Campos Penha

initiatives/genai_red_team_handbook/exploitation/example/Makefile

@@ -31,5 +31,5 @@ stop:
 	$(MAKE) -C $(SANDBOX_DIR) down
 	@echo "✅ Environment cleaned up!"
 
-all: setup attack stop
+all: stop setup attack stop
 	@echo "Red Team Example - Completed!"