Update Snowflake docs - notebooks in workspaces Jupyter based

[ncclementi]

Snowflake Notebooks offers a Jupyter based type notebooks

Snowflake docs: https://docs.snowflake.com/en/user-guide/ui-snowsight/notebooks-in-workspaces/notebooks-in-workspaces-overview

This implies that for this notebook we can use magics like %load_ext . But it seems like the non-jupyter based notebooks are still around.

So we should include this this new type, and get input in what are the plans regarding the non-jupyter based ones.