feat(deps): update actions/setup-python action to v6 (#58)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -36,7 +36,7 @@ jobs:
     needs: lint
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: '3.13'
       - run: python -m pip install --upgrade pip
@@ -91,7 +91,7 @@ jobs:
           git push origin ${{ steps.git_version.outputs.version }}
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.13'