[python] Fix bad merge of soma-shapes notebook

[johnkerl]

Issue and/or context: As tracked on issue #2407 / [sc-51048].

Changes:

Fix bad merge of #3294. Looks like this commit: #3294 (comment)

Notes for Reviewer:

Review link:
https://github.com/single-cell-data/TileDB-SOMA/blob/kerl/fix-notebook-merge/apis/python/notebooks/tutorial_soma_shape.ipynb

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.50%. Comparing base (208c0ab) to head (8bf02fc).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3309      +/-   ##
==========================================
+ Coverage   85.37%   85.50%   +0.12%     
==========================================
  Files          52       52              
  Lines        5499     5506       +7     
==========================================
+ Hits         4695     4708      +13     
+ Misses        804      798       -6     

Flag	Coverage Δ
python	85.50% <ø> (+0.12%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
python_api	85.50% <85.71%> (+0.12%)	⬆️
libtiledbsoma	∅ <ø> (∅)