update SW instructions to run a notebook

[bertdv]

At the BMLIP homepage the following SW instructions are given:

- Please install Miscrosoft's VS code editor and add the Jupyter notebook extension.
- Please install Julia version 1.9 on your machine and then add the Julia extension in VS code.

I have a new machine and I did this. I still could not run the notebooks for my lessons in the VS code editor. I had to add the IJulia package to Julia, and then run Pkg.build("IJulia") in the Julia prompt, otherwise Jupyter cannot find the Julia kernel to run the notebook. This is probably obvious to you, but technically the instructions above are insufficient to run the notebooks in VS code. This will lead to frustration.

Please update the software instructions on the homepage to the exact preparations that a user needs (from scratch) in order to run the notebooks in the VS code editor.