chore(deps): update actions/setup-python action to v6 (#8)

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

Author: renovate[bot]

.github/actions/setup-python-install/action.yml

@@ -4,7 +4,7 @@ runs:
   using: "composite"
   steps:
     - name: Setup Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: "3.13"
         cache: "pip"