fixed large agent falling

Project/Assets/ML-Agents/Examples/CubeWars/Prefabs/CubeWarArea.prefab

   m_GameObject: {fileID: 1265511327613192}
   m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
   m_LocalPosition: {x: 0, y: 0.5, z: 0}
-  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_LocalScale: {x: 1, y: 2, z: 1}
   m_Children:
   - {fileID: 4430881949022472}
   - {fileID: 4534035899647546}
   agentParameters:
     maxStep: 0
   hasUpgradedFromAgentParameters: 1
-  maxStep: 0
+  maxStep: 3000
   area: {fileID: 1819751139121548}
   largeAgent: {fileID: 5707177387575911509}
   turnSpeed: 300
   agentParameters:
     maxStep: 0
   hasUpgradedFromAgentParameters: 1
-  maxStep: 0
+  maxStep: 3000
   area: {fileID: 1819751139121548}
   largeAgent: {fileID: 5707177387575911509}
   turnSpeed: 300
   agentParameters:
     maxStep: 0
   hasUpgradedFromAgentParameters: 1
-  maxStep: 0
+  maxStep: 3000
   area: {fileID: 1819751139121548}
   largeAgent: {fileID: 5707177387575911509}
   turnSpeed: 300
   agentParameters:
     maxStep: 0
   hasUpgradedFromAgentParameters: 1
-  maxStep: 0
+  maxStep: 3000
   area: {fileID: 1819751139121548}
   turnSpeed: 100
   moveSpeed: 1

Project/Assets/ML-Agents/Examples/CubeWars/Scenes/CubeWar.unity

       propertyPath: m_LocalEulerAnglesHint.z
       value: 0
       objectReference: {fileID: 0}
+    - target: {fileID: 4842597515579046, guid: 507699f5e996e4b839e9b05fce9dde76, type: 3}
+      propertyPath: m_LocalScale.y
+      value: 2
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
   m_SourcePrefab: {fileID: 100100000, guid: 507699f5e996e4b839e9b05fce9dde76, type: 3}