Bumps [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv) from 8.3.0 to 8.3.1.
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](https://github.com/astral-sh/setup-uv/compare/v8.3.0...v8.3.1)

---
updated-dependencies:
- dependency-name: astral-sh/setup-uv
  dependency-version: 8.3.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Upstream stopped publishing rolling major/minor tags (v8, v8.0) as
of their v8.0.0 release for supply-chain security reasons, breaking
our workflow which referenced @v8.