Update pytest requirement from ~8.3 to ~8.4 (#251)

Updates the requirements on [pytest](https://github.com/pytest-dev/pytest) to permit the latest version.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.3.0...8.4.0)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 8.4.0
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pyproject.toml

@@ -33,7 +33,7 @@ pympler = "1.1"
 numpy = "2.0.2"
 
 [tool.poetry.dev-dependencies]
-pytest = "~8.3"
+pytest = "~8.4"
 pytest-asyncio = "~0.26"
 pytest-cov = "~6.1"
 pytest-unordered = "~0.6"