Replace deprecated Numpy's `product` by `prod`

[prisae]

Resolve

DeprecationWarning: product is deprecated as of NumPy 1.25.0, and will be removed in NumPy 2.0. Please use prod instead.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (4f1e334) 85.12% compared to head (85de326) 85.12%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #347 +/- ## ======================================= Coverage 85.12% 85.12% ======================================= Files 36 36 Lines 8408 8408 ======================================= Hits 7157 7157 Misses 1251 1251 ```

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