fix: Update notebooks to use include_auxdata kwarg for pyhf.Workspace.data

[matthewfeickert]

Description

Resolves #1585

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* Use `include_auxdata` kwarg for `pyhf.Workspace.data` as part of v0.6.3 API change
   - Amends PR #1562

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Codecov Report

Merging #1588 (ca032e6) into master (248e400) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1588   +/-   ##
=======================================
  Coverage   97.70%   97.70%           
=======================================
  Files          63       63           
  Lines        4050     4050           
  Branches      576      576           
=======================================
  Hits         3957     3957           
  Misses         54       54           
  Partials       39       39           

Flag	Coverage Δ
contrib	25.43% <ø> (ø)
unittests	97.48% <ø> (ø)

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