Merge pull request #2526 from Unity-Technologies/develop-update-offline-bc

Update the offline_bc_config path

config/offline_bc_config.yaml

     use_recurrent: true
     memory_size: 256
     sequence_length: 32
-    demo_path: ./UnitySDK/Assets/Demonstrations/Hallway.demo
+    demo_path: ./demos/ExpertHallway.demo