update minimum cellfinder and segmentation

[alessandrofelder]

Description

What is this PR

• [x] Bug fix
• [ ] Addition of a new feature
• [ ] Other

Why is this PR needed?

New versions of cellfinder and brainglobe-segmentation have a bugfix (to avoid dependency versions being incompatible with numpy>=2)

What does this PR do?

Pins cellfinder and segmentation to newest versions.

References

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How has this PR been tested?

\

Is this a breaking change?

no

Does this PR require an update to the documentation?

We should maybe note somewhere that brainglobe does not support numpy yet?

Checklist:

• [ \ ] The code has been tested locally
• [ \ ] Tests have been added to cover all new functionality (unit & integration)
• [ \ ] The documentation has been updated to reflect any changes
• [x] The code has been formatted with pre-commit

[codecov[bot]]

Codecov Report

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

Project coverage is 60.00%. Comparing base (4dc59bd) to head (e7094d7).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #62 +/- ## ======================================= Coverage 60.00% 60.00% ======================================= Files 1 1 Lines 5 5 ======================================= Hits 3 3 Misses 2 2 ```

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