Bump actions/setup-python from 5 to 6 in the ci group (#76)

Bumps the ci group with 1 update: [actions/setup-python](https://github.com/actions/setup-python).


Updates `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
  dependency-group: ci
...

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

Author: dependabot[bot]

.github/workflows/ci-cd.yml

@@ -92,7 +92,7 @@ jobs:
     - name: >-
         Switch to using Python v${{ matrix.python-version }}
         by default
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
     - name: >-
@@ -191,7 +191,7 @@ jobs:
       wheel-artifact-name: ${{ steps.artifact-name.outputs.wheel }}
     steps:
     - name: Switch to using Python 3.13 by default
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: 3.13
     - name: >-
@@ -397,7 +397,7 @@ jobs:
 
     steps:
     - name: Switch to using Python 3.13 by default
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: 3.13
     - name: >-
@@ -542,7 +542,7 @@ jobs:
     steps:
     - name: Set up Python ${{ matrix.python-version }}
       id: python-install
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}