[deps] Update pytest-cov requirement from ~=5.0.0 to ~=6.1.0

Updates the requirements on [pytest-cov](https://github.com/pytest-dev/pytest-cov) to permit the latest version.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest-cov/compare/v5.0.0...v6.1.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-version: 6.1.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>