feat: bump sheeprl to v0.5.5 #271

Job	Run time
Generate build matrix	7s
build-and-push-arena-images (images/base, base-on3.10-bullseye, on=3.10-bullseye)	1m 45s
build-and-push-arena-images (images/base, base-on3.9-bullseye, on=3.9-bullseye)	2m 5s
build-and-push-arena-images (images/base, base-on3.8-bullseye, on=3.8-bullseye)	1m 49s
build-and-push-arena-images (images/base, base-on3.7-bullseye, on=3.7-bullseye)	1m 55s
build-and-push-arena-images (images/ray_rllib, ray-rllib-on3.10-bullseye, on=3.10-bullseye)	36m 10s
build-and-push-arena-images (images/ray_rllib, ray-rllib-on3.9-bullseye, on=3.9-bullseye)	38m 26s
build-and-push-arena-images (images/ray_rllib, ray-rllib-on3.8-bullseye, on=3.8-bullseye)	1h 31m 1s
build-and-push-arena-images (images/sheeprl, sheeprl-on3.10-bullseye, on=3.10-bullseye)	26m 16s
build-and-push-arena-images (images/sheeprl, sheeprl-on3.9-bullseye, on=3.9-bullseye)	27m 38s
build-and-push-arena-images (images/sheeprl, sheeprl-on3.8-bullseye, on=3.8-bullseye)	32m 56s
build-and-push-arena-images (images/stable-baselines, stable-baselines-on3.7-bullseye, on=3.7-bul...	9m 28s
build-and-push-arena-images (images/stable-baselines3, stable-baselines3-on3.10-bullseye, on=3.10...	32m 28s
build-and-push-arena-images (images/stable-baselines3, stable-baselines3-on3.9-bullseye, on=3.9-b...	27m 16s
build-and-push-arena-images (images/stable-baselines3, stable-baselines3-on3.8-bullseye, on=3.8-b...	28m 47s
	5h 58m 7s

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