Bump nox from 2025.11.12 to 2026.2.9 in /.github/workflows

Bumps [nox](https://github.com/wntrblm/nox) from 2025.11.12 to 2026.2.9.
- [Release notes](https://github.com/wntrblm/nox/releases)
- [Changelog](https://github.com/wntrblm/nox/blob/main/CHANGELOG.md)
- [Commits](wntrblm/nox@2025.11.12...2026.02.09)

---
updated-dependencies:
- dependency-name: nox
  dependency-version: 2026.2.9
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/constraints.txt

@@ -1,2 +1,2 @@
 bump-my-version==1.2.6
-nox==2025.11.12
+nox==2026.2.9