Broken Notebook
**Describe the bug**

The notebook in https://github.com/NVIDIA/NeMo/blob/main/tutorials/asr/Offline_ASR.ipynb cannot be visualized as it says "The Notebook Does Not Appear to Be Valid JSON"

**Steps/Code to reproduce bug**

Open https://github.com/NVIDIA/NeMo/blob/main/tutorials/asr/Offline_ASR.ipynb 
