Update pytest-runner requirement in /.github/scripts (#496)

Updates the requirements on [pytest-runner](https://github.com/pytest-dev/pytest-runner) to permit the latest version.
- [Release notes](https://github.com/pytest-dev/pytest-runner/releases)
- [Changelog](https://github.com/pytest-dev/pytest-runner/blob/main/CHANGES.rst)
- [Commits](https://github.com/pytest-dev/pytest-runner/compare/1.0a1...v6.0.1)

---
updated-dependencies:
- dependency-name: pytest-runner
  dependency-type: direct:production
...

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