Update pytest requirement in the all-dependencies group

Updates the requirements on [pytest](https://github.com/pytest-dev/pytest) to permit the latest version.

Updates `pytest` to 8.3.1
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.2.0...8.3.1)

---
updated-dependencies:
- dependency-name: pytest
  dependency-type: direct:production
  dependency-group: all-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements-test.txt

@@ -4,7 +4,7 @@ cov-core~=1.15
 coverage~=7.6
 flake8~=7.1
 mock~=5.1
-pytest~=8.2
+pytest~=8.3
 pytest-cov~=5.0
 pytest-gitignore~=1.3
 pytest-mock~=3.14