Bump actions/setup-python from 5 to 6 (#111)

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
...

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

Author: dependabot[bot]

.github/workflows/pytest-builds.yml

@@ -21,7 +21,7 @@ jobs:
         submodules: true
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
         architecture: ${{ matrix.arch }}
@@ -57,7 +57,7 @@ jobs:
         submodules: true
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
         allow-prereleases: true
@@ -92,7 +92,7 @@ jobs:
         submodules: true
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
         allow-prereleases: true

.github/workflows/release-wheels.yml

@@ -17,7 +17,7 @@ jobs:
       with:
         submodules: true
 
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       name: Install Python
       with:
         python-version: '3.13'
@@ -158,7 +158,7 @@ jobs:
       with:
         platforms: arm64
 
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       name: Install Python
       with:
         python-version: '3.13'
@@ -219,7 +219,7 @@ jobs:
       with:
         submodules: true
 
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       name: Install Python
       with:
         python-version: '3.13'
@@ -253,7 +253,7 @@ jobs:
   #
   #   steps:
   #   - name: Set up Python ${{ matrix.python-version }}
-  #     uses: actions/setup-python@v5
+  #     uses: actions/setup-python@v6
   #     with:
   #       python-version: ${{ matrix.python-version }}
   #