update walker static vs prefabs

Project/Assets/ML-Agents/Examples/Walker/Prefabs/Platforms/PlatformWalkerDynamicVariableSpeed.prefab

         type: 3}
       propertyPath: m_Model
       value: 
-      objectReference: {fileID: 11400000, guid: dc2e1982748f3474383cc108ef2f7f26,
+      objectReference: {fileID: 11400000, guid: 0a55a602a15e94f2baac4fadf9db5809,
         type: 3}
     - target: {fileID: 1077752704035527914, guid: 90f3321ab5beb43e28bc651909d99e39,
         type: 3}

Project/Assets/ML-Agents/Examples/Walker/Prefabs/Ragdoll/WalkerRagdollStSingleSpeedVariant.prefab

         type: 3}
       propertyPath: m_Model
       value: 
-      objectReference: {fileID: 11400000, guid: e41acb4dffc814200b7789d02f04a83a,
+      objectReference: {fileID: 11400000, guid: 804c856300e7d44e780c4d179d1bfa68,
         type: 3}
     - target: {fileID: 895268871377934298, guid: 765582efd9dda46ed98564603316353f,
         type: 3}

Project/Assets/ML-Agents/Examples/Walker/Scenes/WalkerDynamic.unity

       propertyPath: m_LocalEulerAnglesHint.z
       value: 0
       objectReference: {fileID: 0}
+    - target: {fileID: 8056883497423602449, guid: 8daf438e1a41f4d06850cacc91aa175f,
+        type: 3}
+      propertyPath: m_Model
+      value: 
+      objectReference: {fileID: 11400000, guid: 4108db0b67d9149f2b5024319cf72a3b,
+        type: 3}
     m_RemovedComponents: []
   m_SourcePrefab: {fileID: 100100000, guid: 8daf438e1a41f4d06850cacc91aa175f, type: 3}
 --- !u!1001 &1916011839

Project/Assets/ML-Agents/Examples/Walker/TFModels/OrigTarg.meta

+fileFormatVersion: 2
+guid: 774a63148bc504bbea95350864917703
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Project/Assets/ML-Agents/Examples/Walker/TFModels/OrigTarg/WalkerDynamic.nn.meta

+fileFormatVersion: 2
+guid: 4108db0b67d9149f2b5024319cf72a3b
+ScriptedImporter:
+  fileIDToRecycleName:
+    11400000: main obj
+    11400002: model data
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
+  script: {fileID: 11500000, guid: 19ed1486aa27d4903b34839f37b8f69f, type: 3}

Project/Assets/ML-Agents/Examples/Walker/TFModels/OrigTarg/WalkerDynamicVariableSpeed.nn.meta

+fileFormatVersion: 2
+guid: 0a55a602a15e94f2baac4fadf9db5809
+ScriptedImporter:
+  fileIDToRecycleName:
+    11400000: main obj
+    11400002: model data
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
+  script: {fileID: 11500000, guid: 19ed1486aa27d4903b34839f37b8f69f, type: 3}

Project/Assets/ML-Agents/Examples/Walker/TFModels/OrigTarg/WalkerStatic.nn.meta

+fileFormatVersion: 2
+guid: 804c856300e7d44e780c4d179d1bfa68
+ScriptedImporter:
+  fileIDToRecycleName:
+    11400000: main obj
+    11400002: model data
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
+  script: {fileID: 11500000, guid: 19ed1486aa27d4903b34839f37b8f69f, type: 3}

Project/Assets/ML-Agents/Examples/Walker/TFModels/OrigTarg/WalkerStaticVariableSpeed.nn.meta

+fileFormatVersion: 2
+guid: 98eafc3bb9fda4941b9e23bcb6948463
+ScriptedImporter:
+  fileIDToRecycleName:
+    11400000: main obj
+    11400002: model data
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
+  script: {fileID: 11500000, guid: 19ed1486aa27d4903b34839f37b8f69f, type: 3}