Documentation: update guides, using modules

[pascalgrimaud]

• fix Update documentation guide #2801

[DamnClin]

Adding a link to this page in the header might be a good idea

[pascalgrimaud]

it will be a good idea, I don't have time now, need to leave my computer

[DamnClin]

I'll merge this and take it :)

[codecov]

Codecov Report

Merging #2831 (efd67e4) into main (d0bcbf4) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##                main     #2831   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity      2072      2072           
===========================================
  Files            480       480           
  Lines           8201      8201           
  Branches         164       164           
===========================================
  Hits            8201      8201           

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