build(deps): bump astral-sh/setup-uv from 5 to 6 (#249)

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](astral-sh/setup-uv@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>

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -30,7 +30,7 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
-      - uses: astral-sh/setup-uv@v5
+      - uses: astral-sh/setup-uv@v6
         with:
           enable-cache: true
       - name: Sync
@@ -48,7 +48,7 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: "3.11"
-      - uses: astral-sh/setup-uv@v5
+      - uses: astral-sh/setup-uv@v6
         with:
           enable-cache: true
       - name: Sync with lowest-direct resolution
@@ -64,7 +64,7 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: "3.11"
-      - uses: astral-sh/setup-uv@v5
+      - uses: astral-sh/setup-uv@v6
         with:
           enable-cache: true
       - name: Sync