grpo and toy_rl apps broken

[casteryh]

seems to be broken by api change introduced in #195

[DNXie]

Thanks for submitting the issue. Have you confirmed that the issue is from PR 195?

[casteryh]

Thanks for submitting the issue. Have you confirmed that the issue is from PR 195?

Yes, it's working at commit hash 1223473

[DNXie]

This should be resolved by #228