reduce steps_per_update recurrent sac

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

     )
     new_hyperparams = attr.evolve(
         SAC_TF_CONFIG.hyperparameters,
-        batch_size=256,
+        batch_size=128,
-        steps_per_update=2,
+        steps_per_update=1,
     )
     config = attr.evolve(
         SAC_TF_CONFIG,