Pin numpy to the last stable version

[XianzheMa]

Numpy releases yesterday (16 June 2024) 2.0, which causes the current CI failures. This PR pins numpy to the last stable version to not block development.

[codecov[bot]]

Codecov Report

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

Project coverage is 82.14%. Comparing base (5ad108a) to head (c005c41). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #514 +/- ## ========================================== - Coverage 82.18% 82.14% -0.04% ========================================== Files 214 214 Lines 9961 9962 +1 ========================================== - Hits 8186 8183 -3 - Misses 1775 1779 +4 ```

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[github-actions[bot]]

^{( % to main) ( % to main)}

[MaxiBoether]

i just squashed this since unit tests ran through and i dont expect this to break integration tests. unblocks the other PRs a bit