change coeff to 1

Project/Assets/ML-Agents/Examples/Walker/Prefabs/DynamicPlatformWalker.prefab

     lastNaNStep: 0
   - rewardKey: productOfAllRewards
     rawVal: 0
-    rewardScalar: 0.01
+    rewardScalar: 1
     rewardThisStep: 0
     cumulativeThisEpisode: 0
     cumulativeThisSession: 0