Update Visualization Tutorial Notebook

[mh-nyris]

Hi All,
I found @bottler tutorial (https://www.youtube.com/watch?v=MOBAJb5nJRI&t=5179s) extremely informative and helpful!
However the official tutorial page notebook (https://github.com/facebookresearch/pytorch3d/blob/master/docs/tutorials/render_textured_meshes.ipynb) is different from the one presented during the tutorial on youtube.
Any plan to update this notebook? Would highly appreciate it :-)

Thanks and all the best,
Mike