fix(notebooks): fix tutorial notebook sections

[wpbonelli]

fix #2596

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.5%. Comparing base (556c088) to head (bb60da8).
⚠️ Report is 44 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2598      +/-   ##
===========================================
+ Coverage     55.5%    72.5%   +17.0%     
===========================================
  Files          644      667      +23     
  Lines       124135   128623    +4488     
===========================================
+ Hits         68947    93308   +24361     
+ Misses       55188    35315   -19873     

see 554 files with indirect coverage changes

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