ci: bump nox-poetry from 1.0.3 to 1.2.0 in /.github/workflows

Bumps [nox-poetry](https://github.com/cjolowicz/nox-poetry) from 1.0.3 to 1.2.0.
- [Release notes](https://github.com/cjolowicz/nox-poetry/releases)
- [Commits](cjolowicz/nox-poetry@v1.0.3...v1.2.0)

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

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

.github/workflows/constraints.txt

@@ -1,6 +1,6 @@
 pip==24.2
 nox==2024.10.9
-nox-poetry==1.0.3
+nox-poetry==1.2.0
 poetry==1.8.4
 virtualenv==20.27.1
 toml==0.10.2