build(deps): bump astral-sh/setup-uv from 5 to 6 (#10729)

Bumps [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv) from 5 to 6.
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](https://github.com/astral-sh/setup-uv/compare/v5...v6)

---
updated-dependencies:
- dependency-name: astral-sh/setup-uv
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/build.yaml

@@ -27,7 +27,7 @@ jobs:
       with:
         python-version: 3.13
 
-    - uses: astral-sh/setup-uv@v5
+    - uses: astral-sh/setup-uv@v6
 
     - name: Omit local version for Test PyPI upload
       if: github.event_name == 'push' && github.ref == 'refs/heads/main'