ReinforcementLearningEnvironments-v0.8.8

ReinforcementLearningEnvironments ReinforcementLearningEnvironments-v0.8.8

Diff since ReinforcementLearningEnvironments-v0.8.7

Merged pull requests:

• Fix offline agent test (#1025) (@joelreymont)
• Fix spell check CI errors (#1027) (@joelreymont)
• GPU Code Migration Part 2.1 (#1029) (@jeremiahpslewis)

Closed issues:

• RL Core tests fail sporadically (#1010)
• Tutorial OpenSpiel KuhnOpenNSFP fails (#1024)
• CI: Should spell check be dropped or fixed? (#1026)