Update dependency numpy-stl to v3.1.2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
numpy-stl	==3.0.1 -> ==3.1.2

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Release Notes

WoLpH/numpy-stl (numpy-stl)

### [`v3.1.2`](https://togithub.com/wolph/numpy-stl/releases/tag/v3.1.2) [Compare Source](https://togithub.com/WoLpH/numpy-stl/compare/v3.1.1...v3.1.2) fixed [#​222](https://togithub.com/WoLpH/numpy-stl/issues/222), removed deprecated unused import ### [`v3.1.1`](https://togithub.com/wolph/numpy-stl/releases/tag/v3.1.1) [Compare Source](https://togithub.com/WoLpH/numpy-stl/compare/v3.1.0...v3.1.1) adding exact parameter to `get_mass_properties` `check` call. Thanks to [@​JasperBoogers](https://togithub.com/JasperBoogers) ### [`v3.1.0`](https://togithub.com/wolph/numpy-stl/releases/tag/v3.1.0) [Compare Source](https://togithub.com/WoLpH/numpy-stl/compare/v3.0.1...v3.1.0) Added improved `is_closed_check` thanks to [@​jb-leger](https://togithub.com/jb-leger)

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