Bump astral-sh/setup-uv from 5 to 6

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] <support@github.com>

Author: dependabot[bot]

.github/workflows/pages.yml

@@ -14,7 +14,7 @@ jobs:
     container: ghcr.io/gdsfactory/gdsfactory:main
     steps:
       - uses: actions/checkout@v4
-      - uses: astral-sh/setup-uv@v5
+      - uses: astral-sh/setup-uv@v6
       - name: Installing the library
         run: uv sync --all-extras
       - run: make docs

.github/workflows/test_code.yml

@@ -25,7 +25,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           submodules: "recursive"
-      - uses: astral-sh/setup-uv@v5
+      - uses: astral-sh/setup-uv@v6
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install Dependencies