Small corrections in the tutorials

[sraver]

Changes have been made in three different chapters:

• Part 1: Include installation of jupyterlab package to allow running the Lab
• Part 2/Chapter 3: Remove outdated comment about the parameters of wg having to be a single variable
• Part 2/Chapter 4: Update the variable and step type to match the newly created type of step

[leolara]

@qwang98 please review and approve this

[qwang98]

These are all good fixes but tutorials are now all moved under the book folder and this can't be merged. @sraver Would you mind moving these fixes to (either in this PR or a new one):

https://github.com/privacy-scaling-explorations/chiquito/blob/main/book/part1_chapter5.ipynb?short_path=9eb3361#L87-L90
https://github.com/privacy-scaling-explorations/chiquito/blob/main/book/part2_chapter2.ipynb
https://github.com/privacy-scaling-explorations/chiquito/blob/main/book/part2_chapter4.ipynb

I could have also done it, but don't want to have my name appear under the commit. Thanks!

[sraver]

@qwang98 updated!

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (009690b) 46.84% compared to head (d9365f9) 46.84%.
Report is 2 commits behind head on main.

❗ Current head d9365f9 differs from pull request most recent head f8a34bc. Consider uploading reports for the commit f8a34bc to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #145   +/-   ##
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  Coverage   46.84%   46.84%           
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  Files          21       21           
  Lines        5364     5364           
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  Hits         2513     2513           
  Misses       2851     2851           

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[qwang98]

LGTM thanks!