build(deps): bump pytest from 8.3.5 to 8.4.0 in /requirements (#1228)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 8.3.5 to 8.4.0.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.3.5...8.4.0)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 8.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements/requirements.txt

@@ -3,7 +3,7 @@ scipy == 1.15.2
 matplotlib == 3.10.1
 cvxpy == 1.6.5
 ecos == 2.0.14
-pytest == 8.3.5 # For unit test
+pytest == 8.4.0 # For unit test
 pytest-xdist == 3.7.0 # For unit test
 mypy == 1.15.0 # For unit test
 ruff == 0.11.11 # For unit test