DOC: correct link

[Zeroto521]

• closes DOC: use jupyter replace markdown  #405
• whatsnew entry

jupyter can't be linked via anchor directly

[codecov]

Codecov Report

Merging #409 (4b8f6ba) into master (7d12a6e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #409   +/-   ##
=======================================
  Coverage   99.81%   99.81%           
=======================================
  Files          23       23           
  Lines         550      550           
  Branches       74       74           
=======================================
  Hits          549      549           
  Partials        1        1           

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