Bug in `tutorials/speaker_recognition/ASR_with_SpeakerDiarization.ipynb`
**Describe the bug**

A clear and concise description of what the bug is.

![e](https://user-images.githubusercontent.com/56601466/127006734-044c514e-b5da-45df-bb8c-480030da3b00.PNG)


**Steps/Code to reproduce bug**

Please list *minimal* steps or code snippet for us to be able to reproduce the bug.

A  helpful guide on on how to craft a minimal bug report  http://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports. 


**Expected behavior**

A clear and concise description of what you expected to happen.

**Environment overview (please complete the following information)**

 - Environment location: [Bare-metal, Docker, Cloud(specify cloud provider - AWS, Azure, GCP, Collab)]
 - Method of NeMo install: [pip install or from source]. Please specify exact commands you used to install.
 - If method of install is [Docker], provide `docker pull` & `docker run` commands used

**Environment details**

If NVIDIA docker image is used you don't need to specify these.
Otherwise, please provide:
- OS version - Google Colab
- PyTorch version 
- Python version - 3.7

**Additional context**

Add any other context about the problem here.
Example: GPU model
