reduce block size

Project/Assets/ML-Agents/Examples/PushBlock/Scenes/2ZombieVs3AgentsPushBlock.unity

   m_GameObject: {fileID: 180376172}
   m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
   m_LocalPosition: {x: 2.8199997, y: 1, z: -1.43}
-  m_LocalScale: {x: 4, y: 0.75, z: 4}
+  m_LocalScale: {x: 2, y: 0.75, z: 2}
   m_Children: []
   m_Father: {fileID: 35422107}
   m_RootOrder: 6
   m_GameObject: {fileID: 997359139}
   m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
   m_LocalPosition: {x: 2.8199997, y: 1, z: -1.43}
-  m_LocalScale: {x: 4, y: 0.75, z: 4}
+  m_LocalScale: {x: 2, y: 0.75, z: 2}
   m_Children: []
   m_Father: {fileID: 1056693890}
   m_RootOrder: 6
   m_GameObject: {fileID: 1906676962}
   m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
   m_LocalPosition: {x: 2.8199997, y: 1, z: -1.43}
-  m_LocalScale: {x: 4, y: 0.75, z: 4}
+  m_LocalScale: {x: 2, y: 0.75, z: 2}
   m_Children: []
   m_Father: {fileID: 2124347356}
   m_RootOrder: 6
   m_GameObject: {fileID: 8120829477783372687}
   m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
   m_LocalPosition: {x: 2.8199997, y: 1, z: -1.43}
-  m_LocalScale: {x: 4, y: 0.75, z: 4}
+  m_LocalScale: {x: 2, y: 0.75, z: 2}
   m_Children: []
   m_Father: {fileID: 4006991767121726}
   m_RootOrder: 6