Ensure test notebooks are packaged

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.06%. Comparing base (a6caf18) to head (4da2606).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #281   +/-   ##
=======================================
  Coverage   67.06%   67.06%           
=======================================
  Files          23       23           
  Lines        1579     1579           
  Branches      190      190           
=======================================
  Hits         1059     1059           
  Misses        481      481           
  Partials       39       39           

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