Bump actions/setup-python from 5 to 6

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] <support@github.com>

Author: dependabot[bot]

.github/workflows/deploy-docs.yaml

@@ -41,7 +41,7 @@ jobs:
 
       # https://github.com/actions/setup-python
       - name: Set up Python
-        uses: actions/setup-python@v5.6.0
+        uses: actions/setup-python@v6
         with:
           python-version: 3.13
 

.github/workflows/main.yaml

@@ -40,7 +40,7 @@ jobs:
 
       # https://github.com/actions/setup-python
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5.6.0
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
 

.github/workflows/pypi-publish.yaml

@@ -19,7 +19,7 @@ jobs:
         uses: astral-sh/setup-uv@v6
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.12'