Update ppo_pettingzoo_ma_atari.py #1403

Job	Run time
test-procgen-envs (3.8, 1.3.1, ubuntu-22.04)	2m 58s
test-procgen-envs (3.8, 1.3.1, macos-latest)	4m 5s
test-procgen-envs (3.8, 1.3.1, windows-latest)	5m 51s
test-mujoco_py-envs (3.8, 1.3.1, ubuntu-22.04)	5m 21s
test-mujoco_py-envs-gymnasium (3.8, 1.3.1, ubuntu-22.04)	5m 20s
test-core-envs (3.8, 1.3.1, ubuntu-22.04)	4m 34s
test-core-envs (3.8, 1.3.1, macos-latest)	7m 15s
test-core-envs (3.8, 1.3.1, windows-latest)	5m 36s
test-atari-envs (3.8, 1.3.1, ubuntu-22.04)	6m 43s
test-atari-envs (3.8, 1.3.1, macos-latest)	8m 34s
test-atari-envs (3.8, 1.3.1, windows-latest)	8m 39s
test-mujoco-envs (3.8, 1.3.1, ubuntu-22.04)	3m 50s
test-mujoco-envs-mac (3.8, 1.3.1, macos-latest)	4m 10s
test-mujoco-gymnasium-envs (3.8, 1.3.1, ubuntu-22.04)	3m 54s
test-atari-multigpu-envs (3.8, 1.3.1, ubuntu-22.04)	3m 13s
test-envpool-envs (3.8, 1.3.1, ubuntu-22.04)	4m 22s
test-pettingzoo-envs (3.8, 1.3.1, ubuntu-22.04)	3m 18s
	1h 27m 43s

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