Update dependency pytest to v8.1.2 (#74)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [pytest](https://togithub.com/pytest-dev/pytest)
([changelog](https://docs.pytest.org/en/stable/changelog.html)) |
`8.1.1` -> `8.1.2` |
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|
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|
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|
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|

---

### Release Notes

<details>
<summary>pytest-dev/pytest (pytest)</summary>

###
[`v8.1.2`](https://togithub.com/pytest-dev/pytest/releases/tag/8.1.2)

[Compare
Source](https://togithub.com/pytest-dev/pytest/compare/8.1.1...8.1.2)

# pytest 8.1.2 (2024-04-26)

## Bug Fixes

- [#&#8203;12114](https://togithub.com/pytest-dev/pytest/issues/12114):
Fixed error in `pytest.approx`{.interpreted-text role="func"} when used
with \[numpy]{.title-ref} arrays and comparing with other types.

</details>

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