fix recurrent sac test

ml-agents/mlagents/trainers/tests/torch/test_simple_rl.py

         SAC_TORCH_CONFIG,
         hyperparameters=new_hyperparams,
         network_settings=new_networksettings,
-        max_steps=5000,
+        max_steps=4000,
     )
     check_environment_trains(env, {BRAIN_NAME: config})