Bump pytest from 8.0.2 to 8.1.1 (#57)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 8.0.2 to 8.1.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.0.2...8.1.1)

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

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

tests/requirements.txt

@@ -1,4 +1,4 @@
 coverage==7.4.3
-pytest==8.0.2
+pytest==8.1.1
 pytest-cov==4.1.0
 lightning>=1.8.4