Bump tox-uv from 1.29.0 to 1.31.0

Bumps [tox-uv](https://github.com/tox-dev/tox-uv) from 1.29.0 to 1.31.0.
- [Release notes](https://github.com/tox-dev/tox-uv/releases)
- [Commits](tox-dev/tox-uv@1.29.0...1.31.0)

---
updated-dependencies:
- dependency-name: tox-uv
  dependency-version: 1.31.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]