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/dist.yaml

@@ -25,7 +25,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Setup Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: 3.8
     - name: Build dist

.github/workflows/docs.yaml

@@ -26,7 +26,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.8
       - name: Install dependencies

.github/workflows/test.yml

@@ -37,7 +37,7 @@ jobs:
         fetch-depth: 2
     - name: Setup Python ${{ matrix.python-version }}
       if: matrix.os != 'windows-latest'  # windows-latest only uses preinstalled Python (3.9.13)
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install test dependencies