fix(docs): use sphinx note function

[Rotzbua]

Instead of text "note" use the function which sphinx offers.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.23%. Comparing base (ef24fcb) to head (cf7ef63).
Report is 48 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #604      +/-   ##
==========================================
- Coverage   89.92%   84.23%   -5.69%     
==========================================
  Files          31       21      -10     
  Lines        1032      736     -296     
  Branches      104      117      +13     
==========================================
- Hits          928      620     -308     
- Misses         69       83      +14     
+ Partials       35       33       -2     

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[camilonova]

Thank you