increased entro bonus tennis

Project/Assets/ML-Agents/Examples/Tennis/Scripts/TennisAgent.cs

     {
         if (c.gameObject.CompareTag("ball"))
         {
-            AddReward(.02f + 0.18f * m_BallTouch);
+            AddReward(.2f * m_BallTouch);
         }
     }
 

config/trainer_config.yaml

     batch_size: 2048
     buffer_size: 20480
     hidden_units: 256
+    beta: 0.1
     time_horizon: 1000
     self_play:
         window: 10