Bump actions/setup-python from 5 to 6 (#1393)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/black.yml

@@ -15,7 +15,7 @@ jobs:
       run:
         shell: bash
     steps:
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python }}
       - name: Cancel Previous Runs

.github/workflows/docs.yml

@@ -49,7 +49,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
 

.github/workflows/macos_CI.yml

@@ -30,7 +30,7 @@ jobs:
         with:
           submodules: true
       - name: Set up Python ${{ matrix.python }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python }}
       - name: Install cbindgen

.github/workflows/ubuntu.yml

@@ -17,7 +17,7 @@ jobs:
       run:
         shell: bash
     steps:
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python }}
       - name: Cancel Previous Runs

.github/workflows/wheels.yml

@@ -25,7 +25,7 @@ jobs:
             fetch-depth: 0
 
       - name: Set up Python 3.9
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.9
 
@@ -121,7 +121,7 @@ jobs:
         with:
           name: sdist
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python }}
       - name: Install cbindgen
@@ -162,7 +162,7 @@ jobs:
         uses: actions/download-artifact@v5.0.0
         with:
           name: linux-wheels
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python }}
       - name: install into venv
@@ -191,7 +191,7 @@ jobs:
         uses: actions/download-artifact@v5.0.0
         with:
           name: ${{ matrix.os }}-wheels
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python }}
       - name: install into venv