docs: change github links in notebooks

[antoinedemathelin]

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[codecov-commenter]

Codecov Report

Merging #6 (a955b4d) into master (a965134) will not change coverage.
The diff coverage is n/a.

❗ Current head a955b4d differs from pull request most recent head 2f4557d. Consider uploading reports for the commit 2f4557d to get more accurate results

@@           Coverage Diff           @@
##           master       #6   +/-   ##
=======================================
  Coverage   89.74%   89.74%           
=======================================
  Files          18       18           
  Lines        1629     1629           
=======================================
  Hits         1462     1462           
  Misses        167      167           

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