Avoid deprecated setting of ndarray shape attribute

[paulromano]

Numpy 2.5 deprecated setting the .shape attribute on ndarrays. This PR replaces one instance of this by using the reshape method.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.18%. Comparing base (8168125) to head (70235e7).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #65      +/-   ##
==========================================
- Coverage   87.20%   87.18%   -0.02%     
==========================================
  Files           3        3              
  Lines         750      749       -1     
  Branches      197      197              
==========================================
- Hits          654      653       -1     
  Misses         52       52              
  Partials       44       44              

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