Bump nox-poetry from 0.8.2 to 0.8.4 in /.github/workflows

Bumps [nox-poetry](https://github.com/cjolowicz/nox-poetry) from 0.8.2 to 0.8.4.
- [Release notes](https://github.com/cjolowicz/nox-poetry/releases)
- [Commits](cjolowicz/nox-poetry@v0.8.2...v0.8.4)

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

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

Original-Commit: cjolowicz/cookiecutter-hypermodern-python@4c8b458