Bump actions/setup-python from 5 to 6 (#4)

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 5 to 6.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v5...v6)

---
updated-dependencies:
- dependency-name: actions/setup-python
  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/publish-docs.yml

@@ -20,7 +20,7 @@ jobs:
         uses: actions/checkout@v5
         with:
           fetch-depth: 0
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.11"
       - name: Install the latest version of uv

.github/workflows/publish-pypi.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Fetch tags
         run: git fetch --all --tags
       - name: Python setup
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.11"
       - name: Install the latest version of uv

.github/workflows/run-tests.yml

@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v5
       # run pre-commit
       - name: Python setup
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.11"
       - name: Install the latest version of uv
@@ -37,7 +37,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v5
       - name: Python setup
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python_version }}
       - name: Install the latest version of uv